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Fan M, Wen T, Chen S, Dong Y, Wang CA. Perspectives Toward Damage-Tolerant Nanostructure Ceramics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2309834. [PMID: 38582503 DOI: 10.1002/advs.202309834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/13/2024] [Indexed: 04/08/2024]
Abstract
Advanced ceramic materials and devices call for better reliability and damage tolerance. In addition to their strong bonding nature, there are examples demonstrating superior mechanical properties of nanostructure ceramics, such as damage-tolerant ceramic aerogels that can withstand high deformation without cracking and local plasticity in dense nanocrystalline ceramics. The recent progresses shall be reviewed in this perspective article. Three topics including highly elastic nano-fibrous ceramic aerogels, load-bearing nanoceramics with improved mechanical properties, and implementing machine learning-assisted simulations toolbox in understanding the relationship among structure, deformation mechanisms, and microstructure-properties shall be discussed. It is hoped that the perspectives present here can help the discovery, synthesis, and processing of future structural ceramic materials that are insensitive to processing flaws and local damages in service.
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Affiliation(s)
- Meicen Fan
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Tongqi Wen
- Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, SAR, China
| | - Shile Chen
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Yanhao Dong
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Chang-An Wang
- State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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2
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Sun Y, Wang Y, Chen W, Jiang Q, Chen D, Dong G, Xia Z. Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization. Nat Commun 2024; 15:1033. [PMID: 38310125 PMCID: PMC10838289 DOI: 10.1038/s41467-024-45293-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 01/19/2024] [Indexed: 02/05/2024] Open
Abstract
Phosphor-glass composites (PGC) are excellent candidates for highly efficient and stable photonic converters; however, their synthesis generally requires harsh procedures and long time, resulting in additional performance loss and energy consumption. Here we develop a rapid synthetic route to PGC within about 10 seconds, which enables uniform dispersion of Y3Al5O12:Ce3+ (YAG:Ce) phosphor particles through a particle self-stabilization model in molten tellurite glass. Thanks for good wettability between YAG:Ce micro-particles and tellurite glass melt, it creates an energy barrier of 6.94 × 105 zJ to prevent atomic-scale contact and sintering of particles in the melt. This in turn allows the generation of YAG:Ce-based PGC as attractive emitters with high quantum efficiency (98.4%) and absorption coefficient (86.8%) that can produce bright white light with luminous flux of 1227 lm and luminous efficiency of 276 lm W-1 under blue laser driving. This work shows a generalizable synthetic strategy for the development of functional glass composites.
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Affiliation(s)
- Yongsheng Sun
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Centre of Special Optical Fiber Materials and Devices, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China
| | - Yuzhen Wang
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Centre of Special Optical Fiber Materials and Devices, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China
| | - Weibin Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Qingquan Jiang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Dongdan Chen
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Guoping Dong
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhiguo Xia
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Centre of Special Optical Fiber Materials and Devices, School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641, China.
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3
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Du G, Wen S, Zhao J, Ran P, Wang D, Wei L, Qiao X, Yang Y, Qiu J, Zhou S. Hybridization Engineering of Oxyfluoride Aluminosilicate Glass for Construction of Dual-Phase Optical Ceramics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2205578. [PMID: 36576865 DOI: 10.1002/adma.202205578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 12/24/2022] [Indexed: 06/17/2023]
Abstract
The construction of transparent ceramics under mild conditionsand standard atmospheric pressure has great scientific and technological potential; however, it remains difficult to achieve when conventional ceramic sintering techniques are used. Herein, a mild strategy for constructing dual-phase optical ceramics with high crystallinity (>90%) based on the stepped dual-phase crystallization of hybridized aluminosilicate glass is presented. Theoretical and experimental studies reveal that the hybridization of the glass system enables a new balance between the glass-forming ability and crystallization and can overcome the uncontrolled devitrification phenomenon during the dense crystallization of glass. Transparent hybridized oxide-fluoride ceramics with fiber geometry and dual-phase microstructures are also successfully fabricated. The generality of the strategy is confirmed, and transparent ceramics with various chemical compositions and phase combinations are prepared. Additionally, the cross-section of the ceramic fibers can be easily tuned into a circle, square, trapezoid, or even a triangle. Furthermore, the practical applications of optical ceramics for lighting and X-ray imaging are demonstrated. The findings described here suggest a major step toward expanding the scope of optical ceramics.
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Affiliation(s)
- Guanxin Du
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou, 510640, China
| | - Shaofei Wen
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou, 510640, China
| | - Junjie Zhao
- School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Peng Ran
- College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310027, China
- International Research Center for Advanced Photonics, Hangzhou, Zhejiang, 310027, China
| | - Dazhao Wang
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou, 510640, China
| | - Lei Wei
- School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Xvsheng Qiao
- School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Yang Yang
- College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310027, China
- International Research Center for Advanced Photonics, Hangzhou, Zhejiang, 310027, China
| | - Jianrong Qiu
- College of Optical Science and Engineering, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310027, China
| | - Shifeng Zhou
- State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China
- Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou, 510640, China
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4
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Sui P, Lin H, Lin Y, Lin S, Huang J, Xu J, Cheng Y, Wang Y. Toward high-power-density laser-driven lighting: enhancing heat dissipation in phosphor-in-glass film by introducing h-BN. OPTICS LETTERS 2022; 47:3455-3458. [PMID: 35838702 DOI: 10.1364/ol.460008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/16/2022] [Indexed: 06/15/2023]
Abstract
In this work, hexagonal boron nitride (h-BN) nanocrystals as functional additives in a phosphor-in-glass film are shown to substantially increase the luminous performance driven by a blue laser. Microstructural and spectroscopic studies reveal that h-BN particles distributed over the whole glass matrix build in situ a local heat conductive path which effectively accelerates heat dissipation and so greatly relieves the "thermal run-away effect". The developed composite material with fine thermal manipulation may be a promising phosphor color converter for high-power-density laser-driven lighting.
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Wang M, Meng Y, Zhu Y, Song J, Yang J, Liu C, Zhu H, Yan D, Xu C, Liu Y. Afterglow-Suppressed Lu 2O 3:Eu 3+ Nanoscintillators for High-Resolution and Dynamic Digital Radiographic Imaging. Inorg Chem 2022; 61:11293-11305. [PMID: 35820030 DOI: 10.1021/acs.inorgchem.2c01417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lu2(1-x)Eu2xO3 nanoscintillators (x = 0.005, 0.01, 0.03, 0.05, 0.07, and 0.10) with red emission were synthesized by a coprecipitation method. It is found that their photo- and radioluminescence intensities increase with increasing Eu3+ concentration until x = 0.05. According to their concentration-dependent luminescence intensity ratios (I610(C2)/I582(S6)), the existing energy transfer from Eu3+(S6) (occupying S6 sites) to Eu3+(C2) (occupying C2 sites) can be confirmed. Based on the spectral data and density functional theory (DFT) calculations, the origin of Lu2O3:Eu3+ persistent luminescence at low concentration might be related to the tunneling processes between Eu3+ (occupying C2 and S6 sites) and oxygen interstitials (Oi×). After dispersing afterglow-suppressed Lu2O3:Eu3+ nanoscintillators into polymethyl methacrylate (PMMA) polymer-acetone solution, flexible PMMA-Lu2O3:Eu3+ composite films with high thermal stability and radiation resistance were fabricated by a doctor blade method. As the flexible composite film was used as an imaging plate, static X-ray images with high spatial resolution (5.5 lp/mm) under an extremely low dose of ∼1.1 μGyair can be acquired. When a watch with a moving second hand was used as an object, the dynamic X-ray imaging can be realized under a dose rate of 55 μGyair·s-1. Our results demonstrate that Lu2O3:Eu3+ nanoscintillators can be regarded as candidate materials for dynamic digital radiographic imaging.
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Affiliation(s)
- Mingwei Wang
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yangqi Meng
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yaqi Zhu
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Jia Song
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Jian Yang
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Chunguang Liu
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Hancheng Zhu
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Duanting Yan
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Changshan Xu
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
| | - Yuxue Liu
- School of Physics, Northeast Normal University, 5268 Renmin Street, Changchun 130024, China
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Bazzaoui H, Genevois C, Massiot D, Sarou-Kanian V, Veron E, Chenu S, Beran P, Pitcher MJ, Allix M. Stabilization of the Trigonal Langasite Structure in Ca 3Ga 2–2xZn xGe 4+xO 14 (0 ≤ x ≤ 1) with Partial Ordering of Three Isoelectronic Cations Characterized by a Multitechnique Approach. Inorg Chem 2022; 61:9339-9351. [DOI: 10.1021/acs.inorgchem.2c01173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Haytem Bazzaoui
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Cécile Genevois
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Dominique Massiot
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Vincent Sarou-Kanian
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Emmanuel Veron
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Sébastien Chenu
- UMR CNRS 6226, Rennes Institute of Chemical Sciences, Beaulieu Campus, 263 Avenue Général Leclerc, Rennes 35042, France
| | - Přemysl Beran
- Nuclear Physics Institute of the CAS, Hlavní 130, Řež 250 68, Czech Republic
- European Spallation Source, ESS ERIC, Box 176, Lund SE-22100, Sweden
| | - Michael J. Pitcher
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
| | - Mathieu Allix
- CEMHTI, CNRS UPR 3079, 1d Avenue de la Recherche Scientifique, Orléans 45071, France
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7
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Golonko P, Sadowska K, Ragiń T, Kochanowicz M, Miluski P, Dorosz J, Kuwik M, Pisarski W, Pisarska J, Leśniak M, Dorosz D, Żmojda J. Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions. MATERIALS 2022; 15:ma15113797. [PMID: 35683100 PMCID: PMC9181671 DOI: 10.3390/ma15113797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/22/2022] [Accepted: 05/24/2022] [Indexed: 02/05/2023]
Abstract
Glass-ceramic is semi-novel material with many applications, but it is still problematic in obtaining fibers. This paper aims to develop a new glass-ceramic material that is a compromise between crystallization, thermal stability, and optical properties required for optical fiber technology. This compromise is made possible by an alternative method with a controlled crystallization process and a suitable choice of the chemical composition of the core material. In this way, the annealing process is eliminated, and the core material adopts a glass-ceramic character with high transparency directly in the drawing process. In the experiment, low phonon antimony-germanate-silicate glass (SGS) doped with Eu3+ ions and different concentrations of P2O5 were fabricated. The glass material crystallized during the cooling process under conditions similar to the drawing processes'. Thermal stability (DSC), X-ray photo analysis (XRD), and spectroscopic were measured. Eu3+ ions were used as spectral probes to determine the effect of P2O5 on the asymmetry ratio for the selected transitions (5D0 → 7F1 and 5D0 → 7F2). From the measurements, it was observed that the material produced exhibited amorphous or glass-ceramic properties, strongly dependent on the nucleator concentration. In addition, the conducted study confirmed that europium ions co-form the EuPO4 structure during the cooling process from 730 °C to room temperature. Moreover, the asymmetry ratio was changed from over 4 to under 1. The result obtained confirms that the developed material has properties typical of transparent glass-ceramic while maintaining high thermal stability, which will enable the fabrication of fibers with the glass-ceramic core.
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Affiliation(s)
- Piotr Golonko
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Karolina Sadowska
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Tomasz Ragiń
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Marcin Kochanowicz
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Piotr Miluski
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Jan Dorosz
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
| | - Marta Kuwik
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (M.K.); (W.P.); (J.P.)
| | - Wojciech Pisarski
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (M.K.); (W.P.); (J.P.)
| | - Joanna Pisarska
- Institute of Chemistry, University of Silesia, 9 Szkolna Street, 40-007 Katowice, Poland; (M.K.); (W.P.); (J.P.)
| | - Magdalena Leśniak
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland; (M.L.); (D.D.)
| | - Dominik Dorosz
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Krakow, Poland; (M.L.); (D.D.)
| | - Jacek Żmojda
- Faculty of Electrical Engineering, Bialystok University of Technology, 45D Wiejska Street, 15-351 Bialystok, Poland; (P.G.); (K.S.); (T.R.); (M.K.); (P.M.); (J.D.)
- Correspondence:
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Elevating photoluminescence properties of Y3MgAl3SiO12:Ce3+ transparent ceramics for high-power white lighting. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.04.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Yu Y, Zheng Y, Liu X, Yuan Y, He X. Making Ultra-Tough Nanoceramics by Columnar Submicrocrystals with Three-Level Micro-Nano Structures. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2105367. [PMID: 35253979 DOI: 10.1002/smll.202105367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/14/2021] [Indexed: 06/14/2023]
Abstract
The low fracture toughness of equiaxed nanocrystalline ceramics is the main bottleneck of its wide range of commercial applications. Here, the authors report a method to overcome this limitation for preparing ultra-tough nanoceramics from using amorphous and supersaturated Al2 O3 /ZrO2 solid solution micro-powders, which is fabricated by Al-O2 ultrahigh-temperature combustion synthesis assisted rapid water cooling. The Al2 O3 /ZrO2 micro-powders containing amorphous and metastable dendritic solid solutions can induce the three-level micro-nano structure (submicro/nano/supra-nano) of the high-content (up to 70-90%) columnar submicro-crystals accompanied with high-density nanoprecipitation after sintering or annealing, which makes the fracture toughness of Al2 O3 /ZrO2 ceramics with a unique combination of high-strength and high-hardness increased by 50-100%. This method is beneficial to microstructural design of high-performance ceramics and can be widely applied to various ceramic systems, coupled with simplicity, low-cost, and high-efficiency, making it suitable to industrially produce large-sized nanoceramics with specific grain geometry in large quantities.
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Affiliation(s)
- Yongdong Yu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Yongting Zheng
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Xudong Liu
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Yuchen Yuan
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Xiaodong He
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, P. R. China
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Han K, Sakhatskyi K, Jin J, Zhang Q, Kovalenko MV, Xia Z. Seed-Crystal-Induced Cold Sintering Toward Metal Halide Transparent Ceramic Scintillators. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110420. [PMID: 35231955 DOI: 10.1002/adma.202110420] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Scintillators with high spatial resolution at a low radiation dose rate are desirable for X-ray medical imaging. To challenge the state-of-art technology, it is necessary to design large-area wafers with high light yield, oriented light transport, and reduced light scattering. Here, a seed-crystal-induced cold sintering is adopted and a <001>-textured TPP2 MnBr4 (TPP: tetraphenylphosphonium) transparent ceramic is fabricated with a large-area wafer of 5 cm in diameter, exhibiting high optical transparency of above 68% over the 450-600 nm range. The compelling scintillation performance of the TPP2 MnBr4 wafer includes a light yield of ≈78 000 ± 2000 photons per MeV, a low detection limit 8.8 nanograys per second, about 625 times lower than the requirement of X-ray diagnostics (5500 nanograys per second), and an energy resolution of 17% for high-energy γ-rays (662 keV). X-ray imaging demonstrates a high spatial resolution of 15.7 lp mm-1 . Moreover, the designed material exhibits good retention of the radioluminescence intensity and light yield. This work presents a paradigm for achieving light-guiding properties with high transparency and large-area fabrication by grain orientation engineering, and the transparent, textured metal halide ceramic scintillator is expected to provide a route for advancement in the X-ray imaging of tomorrow.
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Affiliation(s)
- Kai Han
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Kostiantyn Sakhatskyi
- Department of Chemistry and Applied Biosciences, Institute of Inorganic Chemistry, ETH Zürich, Zürich, 8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, 8600, Switzerland
| | - Jiance Jin
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Qinyuan Zhang
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- School of Physics and Optoelectronics, South China University of Technology, Guangzhou, Guangdong, 510641, China
| | - Maksym V Kovalenko
- Department of Chemistry and Applied Biosciences, Institute of Inorganic Chemistry, ETH Zürich, Zürich, 8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, 8600, Switzerland
| | - Zhiguo Xia
- State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, China
- School of Physics and Optoelectronics, South China University of Technology, Guangzhou, Guangdong, 510641, China
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11
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Zheng G, Xiao W, Wu J, Liu X, Masai H, Qiu J. Glass-Crystallized Luminescence Translucent Ceramics toward High-Performance Broadband NIR LEDs. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105713. [PMID: 35072364 PMCID: PMC8922114 DOI: 10.1002/advs.202105713] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/30/2021] [Indexed: 05/05/2023]
Abstract
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are newly emergent broadband light sources for miniaturizing optical systems like spectrometers. However, traditional converters with NIR phosphors encapsulated by organic resins suffer from low external quantum efficiency (EQE), strong thermal quenching as well as low thermal conductivity, thus limiting the device efficiency and output power. Through pressureless crystallization from the designed aluminosilicate glasses, here broadband Near-infrared (NIR) emitting translucent ceramics are developed with high EQE (59.5%) and excellent thermal stability (<10% intensity loss and negligible variation of emission profile at 150 °C) to serve as all-inorganic visible-to-NIR converters. A high-performance NIR phosphor-converted light emitting diodes is further demonstrated with a record NIR photoelectric efficiency (output power) of 21.2% (62.6 mW) at 100 mA and a luminescence saturation threshold up to 184 W cm-2 . The results can substantially expand the applications of pc-LEDs, and may open up new opportunity to design efficient broadband emitting materials.
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Affiliation(s)
- Guojun Zheng
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Wenge Xiao
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Jianhong Wu
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Xiaofeng Liu
- School of Materials Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Hirokazu Masai
- National Institute of Advanced Industrial Science and TechnologyOsaka563‐8577Japan
| | - Jianrong Qiu
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
- CAS Center for Excellence in Ultra‐intense Laser ScienceShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai201800P. R. China
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12
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Keshavarzi A, Feiz Bakhsh M, Safari Yazd N, Doosti A. Anisotropic crystallization of YAG on the surface of glass by CO2 laser irradiation. CrystEngComm 2022. [DOI: 10.1039/d1ce01292d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work studied the laser process and crystallization of 2D YAG from yttrium aluminosilicate glass. Anisotropic YAG crystallized through a continuous wave (CW) CO2 laser irradiation process. We demonstrate the...
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13
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Investigations of Thermal Stability and Spectroscopic Features of Sm3+ Doped Strontium Aluminate Glasses. COATINGS 2021. [DOI: 10.3390/coatings12010003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the present work, a series of Sm3+ doped transparent strontium aluminate glasses with the composition Al2O3-(3-x)SrO: xSm3+ (x = 0, 0.01, 0.03, 0.06, 0.1, 0.2) were fabricated by a containerless process using an aerodynamic levitation furnace. The structural characteristics, density, Vicker’s hardness, and thermal and spectroscopic behaviors of these glasses were investigated. All the glasses exhibit excellent thermal stabilities (Tg ≥ 792 °C) and the glass-forming ability is enhanced with the increasing content of Sm3+. The emission spectra recorded under an excitation of 404 nm show four emission transitions as a result of 4G5/2 translated to the lower states of 6H5/2, 6H7/2, 6H9/2, and 6H11/2, and a bright orange-reddish luminescence can be observed in Al2O3-(3-x)SrO: xSm3+ glasses. The high thermal stability, good glass-forming ability and excellent hardness provide new options for the development of visible orange-reddish lasers and smart photoluminescent glass coating materials.
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14
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Genevois C, Bazzaoui H, Boyer M, Ory S, Ledemi Y, Messaddeq Y, Pitcher MJ, Allix M. Emergence of A-Site Cation Order in the Small Rare-Earth Melilites Sr REGa 3O 7 ( RE = Dy-Lu, Y). Inorg Chem 2021; 60:12339-12354. [PMID: 34346214 DOI: 10.1021/acs.inorgchem.1c01565] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
SrREGa3O7 melilite ceramics with large rare-earth elements (RE = La to Y) are famous materials especially known for their luminescence properties. Using an innovative approach, the full and congruent crystallization from glass process, SrREGa3O7 transparent polycrystalline ceramics with small rare earth elements (RE = Dy-Lu and Y) have been successfully synthesized and characterized. Interestingly, compared to the classic tetragonal (P4̅21m) melilite structure composed of mixed Sr/RE cationic sites, these compositions can crystallize in a 3 × 1 × 1 orthorhombic (P21212) superstructure. A detailed study of the superstructure, investigated using different techniques (synchrotron and neutron powder diffraction, STEM-HAADF imaging, and EDS mapping), highlights the existence of a Sr/RE cation ordering favored by a large Sr/RE size mismatch and a sufficiently small RE cation. An appropriate control of the synthesis conditions through glass crystallization enables the formation of the desired polymorphs, either ordered or disordered. The influence of this tailored cationic ordering/disordering on the RE luminescent spectroscopic properties have been investigated. A stronger structuration of the RE emission band is observed in the ordered ceramic compared to the disordered ceramic and the glass, whose band shapes are very similar, indicating that the RE environments in the glass and disordered ceramic are close.
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Affiliation(s)
- Cécile Genevois
- CNRS, CEMHTI UPR 3079, Université Orléans, F-45071 Orléans, France
| | - Haytem Bazzaoui
- CNRS, CEMHTI UPR 3079, Université Orléans, F-45071 Orléans, France
| | - Marina Boyer
- CNRS, CEMHTI UPR 3079, Université Orléans, F-45071 Orléans, France
| | - Sandra Ory
- CNRS, CEMHTI UPR 3079, Université Orléans, F-45071 Orléans, France
| | - Yannick Ledemi
- Center for Optics, Photonics and Laser, Université Laval, Quebec City, Canada
| | - Younès Messaddeq
- Center for Optics, Photonics and Laser, Université Laval, Quebec City, Canada
| | | | - Mathieu Allix
- CNRS, CEMHTI UPR 3079, Université Orléans, F-45071 Orléans, France
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15
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Ma Y, Zhang L, Huang J, Wang R, Li T, Zhou T, Shi Z, Li J, Li Y, Huang G, Wang Z, Selim FA, Li M, Wang Y, Chen H. Broadband emission Gd 3Sc 2Al 3O 12:Ce 3+ transparent ceramics with a high color rendering index for high-power white LEDs/LDs. OPTICS EXPRESS 2021; 29:9474-9493. [PMID: 33820375 DOI: 10.1364/oe.417464] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
The discovery of single structure Ce3+ doped garnet transparent ceramics (TCs) with a broad full width at half maximum (FWHM) is essential to realize a high CRI for high-power white light emitting diodes (LEDs) and laser diodes (LDs). In this work, by utilizing the ion substitution engineering strategy, pure phase Gd3Sc2Al3O12:Ce3+ (GSAG:Ce) TC with a broad FWHM of 132.4 nm and a high CRI value of 80.7 was fabricated through the vacuum sintering technique for the first time. The optimized in-line transmittance of TCs was 58.4% @ 800 nm. Notably, the GSAG:Ce TCs exhibited a remarkable red shift from 546 nm to 582 nm, with a high internal quantum efficiency (IQE) of 46.91%. The degraded thermal stability in Ce:GSAG TCs was observed compared with that of Ce:YAG TC, owing to the narrowed band gap of GSAG. Additionally, remote excitation white LEDs/LDs were constructed by combining GSAG:Ce TCs with blue LED chips or laser sources. A tunable color hue from yellow to shinning white was achieved in white LEDs, whereas the acquired CRI and CCT of the white LDs were 69.5 and 7766 K, respectively. This work provides a new perspective to develop TCs with high CRI for their real applications in high-power white LEDs/LDs.
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16
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Hu T, Ning L, Gao Y, Qiao J, Song E, Chen Z, Zhou Y, Wang J, Molokeev MS, Ke X, Xia Z, Zhang Q. Glass crystallization making red phosphor for high-power warm white lighting. LIGHT, SCIENCE & APPLICATIONS 2021; 10:56. [PMID: 33712554 PMCID: PMC7955133 DOI: 10.1038/s41377-021-00498-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/09/2021] [Accepted: 02/24/2021] [Indexed: 05/03/2023]
Abstract
Rapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light pumped red phosphors for improved light quality. Herein, we discovered an unprecedented red-emitting Mg2Al4Si5O18:Eu2+ composite phosphor (λex = 450 nm, λem = 620 nm) via the crystallization of MgO-Al2O3-SiO2 aluminosilicate glass. Combined experimental measurement and first-principles calculations verify that Eu2+ dopants insert at the vacant channel of Mg2Al4Si5O18 crystal with six-fold coordination responsible for the peculiar red emission. Importantly, the resulting phosphor exhibits high internal/external quantum efficiency of 94.5/70.6%, and stable emission against thermal quenching, which reaches industry production. The maximum luminous flux and luminous efficiency of the constructed laser driven red emitting device reaches as high as 274 lm and 54 lm W-1, respectively. The combinations of extraordinary optical properties coupled with economically favorable and innovative preparation method indicate, that the Mg2Al4Si5O18:Eu2+ composite phosphor will provide a significant step towards the development of high-power solid-state lighting.
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Affiliation(s)
- Tao Hu
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
| | - Lixin Ning
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, Anhui, China.
| | - Yan Gao
- School of Applied Physic and Materials, Wuyi University, Jiangmen, Guangdong, China
| | - Jianwei Qiao
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
| | - Enhai Song
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
| | - Zitao Chen
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
| | - Yayun Zhou
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China
| | - Jing Wang
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Maxim S Molokeev
- Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
- Siberian Federal University, Krasnoyarsk, Russia
- Research and Development Department, Kemerovo State University, Kemerovo, Russia
| | - Xiaoxing Ke
- Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology Beijing, Beijing, China
| | - Zhiguo Xia
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China.
| | - Qinyuan Zhang
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, China.
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17
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Zhang Y, Liu J, Zhang Y, Yang H, Yu Y, He Q, Liang X, Liu Y, Xiang W. Robust YAG:Ce single crystal for ultra-high efficiency laser lighting. J RARE EARTH 2021. [DOI: 10.1016/j.jre.2021.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Doosti A, Keshavarzi A, Safari Yazd N, Leriche A. Laser-induced and space-selective crystallization of yttrium aluminum garnet crystal from SiO 2/Al 2O 3/Y 2O 3/KF/Na 2O/AlF 3/B 2O 3 glass system. CrystEngComm 2021. [DOI: 10.1039/d0ce01165g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Femtosecond laser-induced crystallization in glasses is of interest because of its significant applications in optics and photonics.
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Affiliation(s)
- Azadeh Doosti
- Ceramic Department
- Materials and Energy Research Center (MERC)
- Iran
| | | | - Nazila Safari Yazd
- Electromagnetism and Telecommunications Department
- Faculty of Engineering
- University of Mons
- Mons
- Belgium
| | - Anne Leriche
- LMCPA
- Université Polytechnique Hauts-de-France
- F-59600 Maubeuge
- France
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19
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Castaing V, Monteiro C, Sontakke AD, Asami K, Xu J, Fernández-Carrión AJ, Brik MG, Tanabe S, Allix M, Viana B. Hexagonal Sr 1-x/2Al 2-xSi xO 4:Eu 2+,Dy 3+ transparent ceramics with tuneable persistent luminescence properties. Dalton Trans 2020; 49:16849-16859. [PMID: 33179669 DOI: 10.1039/d0dt03137b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Co-doped hexagonal Sr1-x/2Al2-xSixO4:Eu2+,Dy3+ (0.1 ≤ x ≤ 0.5) transparent ceramics have been elaborated by full glass crystallization. The compositions with low SiO2 content (x ≤ 0.4) require fast quenching conditions to form glass, i.e. specific elaboration processes such as aerodynamic levitation coupled to laser heating, whereas the x = 0.5 glass composition can be prepared on a large scale by the classic melt-quenching method in commercial furnaces. After a single thermal treatment, the resulting SrAl2O4-based transparent ceramics show varying photoluminescence emission properties when x increases. These variations are also observable in persistent luminescence, resulting in an afterglow colour-tuning ranging from green to light blue. Afterglow excitation spectra highlight the possible activation in the visible range of the obtained persistent luminescence. Indeed, persistent luminescence of hexagonal Sr0.75Al1.5Si0.5O4:Eu2+,Dy3+ large transparent ceramics has been successfully charged using a typical smartphone low power white light source. Moreover, thermoluminescence glow curves of samples containing different Dy3+ doping concentrations are studied to gain insights regarding the traps' origin and depth. Coupling thermoluminescence results together with luminescence thermal quenching and band gap calculations appear useful to understand the charge trapping and detrapping evolution with the material composition. Varying the Si-content in hexagonal Sr1-x/2Al2-xSixO4:Eu2+,Dy3+ compounds appears as a promising strategy to obtain transparent materials with tuneable green to light blue persistent luminescence.
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Affiliation(s)
- Victor Castaing
- Chimie ParisTech, Institut de Recherche de Chimie Paris, PSL Research University, CNRS, Paris 75005, France.
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20
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Industry-friendly synthesis and high saturation threshold of a LuAG:Ce/glass composite film realizing high-brightness laser lighting. Ann Ital Chir 2020. [DOI: 10.1016/j.jeurceramsoc.2020.06.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Wisniewski W, Švančárek P, Prnová A, Parchovianský M, Galusek D. Y 2O 3-Al 2O 3 microsphere crystallization analyzed by electron backscatter diffraction (EBSD). Sci Rep 2020; 10:11122. [PMID: 32632218 PMCID: PMC7338460 DOI: 10.1038/s41598-020-67816-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 05/04/2020] [Indexed: 11/09/2022] Open
Abstract
The crystallization of glass microspheres in the Y2O3-Al2O3-system produced from precursor powders of four different nominal compositions via flame synthesis is analyzed in detail by electron microscopy with a focus on electron backscatter diffraction (EBSD). Growth models are formulated for individual microspheres crystallized during flame synthesis as well as after an additional heat treatment step. 16 different types of crystallized bodies are cataloged for future reference. They are presented without regard for their relative occurrence; some are extremely rare but illustrate the possibilities of flame synthesis in the analyzed system. All three phases in the binary Y2O3-Al2O3-phase diagram (Y3Al5O12, YAlO3 and Y4Al2O9) and α-alumina are located by EBSD. Energy dispersive X-ray spectrometry results obtained from these microspheres show that their chemical composition can deviate from the nominal composition of the precursor powder. The multitude of differing microsphere types showing polygon and dendritic crystal growth as well as phase separation indicate that flame synthesis can lead to a wide variety of parameters during microsphere production, e.g. via irregular flight paths through the flame, contaminants or irregular cooling rates.
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Affiliation(s)
- Wolfgang Wisniewski
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia.
| | - Peter Švančárek
- Joint Glass Centre of the IIC SAS, TnU AD, and FChFT STU, Študentská 2, 911 50, Trenčín, Slovakia
| | - Anna Prnová
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia
| | - Milan Parchovianský
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia
| | - Dušan Galusek
- Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, 911 50, Trenčín, Slovakia
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22
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Highly efficient phosphor-glass composites by pressureless sintering. Nat Commun 2020; 11:2805. [PMID: 32499593 PMCID: PMC7272639 DOI: 10.1038/s41467-020-16649-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/15/2020] [Indexed: 11/13/2022] Open
Abstract
The development of high-power white light-emitting diodes demands highly efficient and stable all-inorganic color converters. In this respect, phosphor-glass/ceramic composites show great promise as they could combine the merits of high quantum efficiency of phosphors and high chemical and thermal stabilities of glass/ceramic matrices. However, strong interfacial reaction between phosphors and matrices at high temperature results in quantum efficiency loss of the embedded phosphors, and traditional solutions rely on high-pressure consolidation techniques. Here we report the intrinsic inhibition of interfacial reaction by using silica glass rather than multicomponent glasses as the matrix. The embedment of phosphors is achieved via a pressureless sintering method, rendering these color-tunable phosphor-glass composites not only accessible to three-dimensional printing technique, but also highly efficient (internal quantum efficiency >90.0%), thermally stable at 1200 °C and hydrothermally stable at 200 °C. Our results provide a facile and general strategy for developing all-inorganic functional composites. Phosphor-glass/ceramic composites are attractive for high-power white light-emitting diodes, but interfacial reaction leads to loss of quantum efficiency. Here the authors report a reduction sintering method for embedment of phosphors into silica glass with limited interfacial reaction.
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23
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Huang P, Zhou B, Zheng Q, Tian Y, Wang M, Wang L, Li J, Jiang W. Nano Wave Plates Structuring and Index Matching in Transparent Hydroxyapatite-YAG: Ce Composite Ceramics for High Luminous Efficiency White Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1905951. [PMID: 31743517 DOI: 10.1002/adma.201905951] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/26/2019] [Indexed: 05/20/2023]
Abstract
Replacing traditional luminous silicone or resins with phosphor in ceramics (PiCs) as color converters has been proposed as an efficient way to improve thermal stability of high-power white light-emitting diodes (WLEDs). However, excessive light scattering in existing PiCs results in enormous phosphor-converted light losses, which makes the luminosity of current PiCs color converters less efficient and means that they can only be used in devices working in reflective mode. By introducing nano wave plate structuring and Rayleigh scattering, luminous hydroxyapatite (HA)-YAG: Ce ceramics are prepared from mesoporous HA nanorods and YAG: Ce phosphors at 850 °C, enabling for the first time WLEDs equipped with PiC color converters in transmission mode. With low-temperature sintering and a highly transparent matrix, the quantum yield of HA-YAG: Ce retains ≈90% of the raw phosphor, and WLEDs with the color converters exhibit a record luminous efficiency of 170 lm W-1 and a correlated color temperature below 4500 K. A facile and practical strategy of using nano structural modulation to eliminate birefringence-induced light scattering for fabricating high-performance ceramic converters suitable for multiple mode luminaires is demonstrated.
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Affiliation(s)
- Ping Huang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Beiying Zhou
- Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai, 201620, P. R. China
| | - Qi Zheng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Yuan Tian
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Mengmeng Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Lianjun Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, P. R. China
| | - Jianlin Li
- School of Materials and Chemical Engineering, Hainan University, Haikou, 570228, P. R. China
| | - Wan Jiang
- Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai, 201620, P. R. China
- Institute of Functional Materials, Donghua University, Shanghai, 201620, P. R. China
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24
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Combined sodium and fluorine promote diopside continuous growth to achieve one-step crystallization in CaO-Al2O3-SiO2-Fe2O3 glass-ceramics. Ann Ital Chir 2019. [DOI: 10.1016/j.jeurceramsoc.2019.07.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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25
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Highly transparent and color-adjustable Eu2+ doped SrO-SiO2-Al2O3 multilayered glass ceramic prepared by controlling crystallization from glass. Ann Ital Chir 2019. [DOI: 10.1016/j.jeurceramsoc.2019.05.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Wu H, Xie L, He M, Zhang R, Tian Y, Liu S, Gong T, Huo F, Yang T, Zhang Q, Guo S, Tian W. A wear-resistant TiO 2 nanoceramic coating on titanium implants for visible-light photocatalytic removal of organic residues. Acta Biomater 2019; 97:597-607. [PMID: 31398472 DOI: 10.1016/j.actbio.2019.08.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 07/25/2019] [Accepted: 08/02/2019] [Indexed: 12/18/2022]
Abstract
An effective treatment for peri-implantitis is to completely remove all the bacterial deposits from the contaminated implants, especially the organic residues, to regain biocompatibility and re-osseointegration, but none of the conventional decontamination treatments has achieve this goal. The photocatalytic activity of TiO2 coating on titanium implants to degrade organic contaminants has attracted researchers' attention recently. But a pure TiO2 coating only responses to harmful ultraviolet light. Additionally, the poor coating mechanical properties are unable to protect the coating integrity versus initial mechanical decontamination. To address these issues, a unique TiO2 nanoceramic coating was fabricated on titanium substrates through an innovative plasma electrolytic oxidation (PEO) based procedure, which showed a disordered layer with oxygen vacancies on the outmost part. As a result, the coating could decompose methylene blue, rhodamine B, and pre-adsorbed lipopolysaccharide (LPS) under visible light. Additionally, the coating showed two-fold higher hardness than untreated titanium and excellent wear resistance against steel decontamination instruments, which could be attributed to the specific micro-structure, including the densely packed nanocrystals and good metallurgical combination. Moreover, the in vitro response of MG63 cells confirmed that the coating had comparable biocompatibility and osteoconductivity to untreated titanium substrates. This study provides a unique coating technique as well as a photocatalytic cleaning strategy to enhance decontamination of titanium dental implants, which will favour the development of peri-implantitis treatments. STATEMENT OF SIGNIFICANCE: The treatment of peri-implantitis is based on the complete removal of bacterial deposits, especially the organic residues, but conventional decontamination treatments are hard to achieve it. The photocatalytic activity of TiO2 coating on titanium implants to degrade organic contaminants provides a promising strategy for deeper decontamination, but its nonactivation to visible light and poor mechanical properties have limited its application. To address these issues, a unique TiO2 nanoceramic coating was fabricated on titanium substrates based on plasma electrolytic oxidation. The coating showed enhanced visible-light photocatalytic activity, excellent wear resistance and satisfied biocompatibility. Based on this functional coating, it is promising to develop a more efficient strategy for deep decontamination of implant surface, which will favour the development of peri-implantitis treatments.
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27
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Liu Y, Liu S, Sun P, Du Y, Lin S, Xie RJ, Dong R, Jiang J, Jiang H. Transparent Ceramics Enabling High Luminous Flux and Efficacy for the Next-Generation High-Power LED Light. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21697-21701. [PMID: 31117431 DOI: 10.1021/acsami.9b02703] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
By designing novel chemical compositions and controlling precursor powders, perfect transparent ceramics (TCs) of Gd3Al4GaO12:2%Ce3+ garnets (GAGG:2%Ce3+) were achieved for the first time. Ce3+ distributions in ceramics were revealed by micromorphology and micro-cathodoluminescence. Benefiting from the components that are rich in red emission, warm light with a correlated color temperature of about 2800 K was generated when TC was used in high-power (hp) blue light emitting diodes (LEDs) (∼450 nm, ∼34 W driven at 1 A). The hp LED device shows high brightness with a luminous flux nearly 2100 lm. The luminous efficacy even reaches 388 lm/W, which is the highest value reported till now, indicating that the use of GAGG:2%Ce3+ TCs promises energy saving. We believe that this work will open a new perspective to develop TCs for next-generation hp LED lighting to substitute traditional hp xenon lamps and high-pressure sodium lamps.
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Affiliation(s)
- Yongfu Liu
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Shuang Liu
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
- Nano Science and Technology Institute , University of Science and Technology of China , Suzhou 215123 , P. R. China
| | - Peng Sun
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Yuanbao Du
- Ningbo Sunpu-Opto Semiconductor Co. Ltd. , Ningbo , 315000 , P. R. China
| | - Sheng Lin
- Ningbo Sunpu-Opto Semiconductor Co. Ltd. , Ningbo , 315000 , P. R. China
| | - Rong-Jun Xie
- College of Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - Rui Dong
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Jun Jiang
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Haochuan Jiang
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
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28
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Liu S, Sun P, Liu Y, Zhou T, Li S, Xie RJ, Xu X, Dong R, Jiang J, Jiang H. Warm White Light with a High Color-Rendering Index from a Single Gd 3Al 4GaO 12:Ce 3+ Transparent Ceramic for High-Power LEDs and LDs. ACS APPLIED MATERIALS & INTERFACES 2019; 11:2130-2139. [PMID: 30565456 DOI: 10.1021/acsami.8b18103] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Transparent ceramics (TCs) are promising for high-power (hp) white light-emitting diode (WLED) and laser diode (LD) lighting. However, comfortable warm white light has not been achieved only using a single TC in hp-WLEDs/LDs. Herein, highly transparent Gd3Al4GaO12:Ce3+ (GAGG:Ce3+) TCs (transmittance, T = 55.9-80.2%) were prepared via a solid-state reaction. Ce3+ as a doped activator center in grains plays a positive role in luminescence based on the microstructural investigations by scanning electron microscopy and the cathodoluminescence system. T decreases upon increasing the Ce3+ concentration and/or the ceramic thickness, whereas the luminous efficacy of hp-WLEDs/LDs goes up. For blue hp-LEDs driven at 350 mA or LDs of 2 W, warm white light with a low correlated-color temperature of ∼3000 K was achieved by a single GAGG:Ce3+ TC, benefiting from its broad emission band (full width at half maximum, FWHM = 133-137 nm) and abundant red components (peaking at about 568-574 nm). The color-rendering index of hp-WLEDs reaches 78.9. These results are much better than the performance of the traditional Y3Al5O12:Ce3+ (YAG:Ce3+) TC, indicating that GAGG:Ce3+ TCs are promising color converters for hp-WLEDs/LDs with a comfortable warm white light.
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Affiliation(s)
- Shuang Liu
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
- Nano Science and Technology Institute , University of Science and Technology of China , Suzhou 215123 , P. R. China
| | - Peng Sun
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Yongfu Liu
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Tianliang Zhou
- College of Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - Shuxing Li
- College of Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - Rong-Jun Xie
- College of Materials , Xiamen University , Xiamen 361005 , P. R. China
| | - Xin Xu
- School of Chemistry and Materials Science , University of Science and Technology of China , Hefei 230026 , P. R. China
| | - Rui Dong
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Jun Jiang
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
| | - Haochuan Jiang
- Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences , Ningbo 315201 , P. R. China
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Zhang R, Wang Y, Tian M, Wang H. Highly transparent LiAlON ceramic prepared by reaction sintering and post hot isostatic pressing. Ann Ital Chir 2018. [DOI: 10.1016/j.jeurceramsoc.2018.07.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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du Merac MR, Bram M, Malzbender J, Ziegner M, Rasinski M, Guillon O. Increasing Fracture Toughness and Transmittance of Transparent Ceramics using Functional Low-Thermal Expansion Coatings. Sci Rep 2018; 8:15644. [PMID: 30353101 PMCID: PMC6199310 DOI: 10.1038/s41598-018-33919-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 09/28/2018] [Indexed: 11/24/2022] Open
Abstract
Transparent polycrystalline ceramics have the potential to enable applications no other materials can, but to do so their strength and toughness must be improved. However, surface strengthening treatments like those used for glasses have so far remained elusive. Here for the first time, we report on engineering unprecedented surface compression, of the magnitude achieved for ion-exchange strengthened glasses (~750 MPa) in transparent ceramics. This was achieved by applying functional, low thermal-expansion yttria coatings onto yttria-stabilized zirconia substrates and thermally treating. In some instances, the treatment more than doubled the fracture toughness while simultaneously increasing light transmittance.
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Affiliation(s)
- Marc Rubat du Merac
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany.,Geomaterialwissenschaft, Institut für Angewandte Geowissenschaften, Technische Universität Darmstadt, 64287, Darmstadt, Germany
| | - Martin Bram
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany
| | - Jürgen Malzbender
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany
| | - Mirko Ziegner
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany
| | - Marcin Rasinski
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany
| | - Olivier Guillon
- Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany. .,Jülich Aachen Research Alliance: JARA-Energy, 52062, Aachen, 52425, Jülich, Germany.
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31
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Liu J, Lu N, He G, Li X, Li J, Li J. Spark plasma sintering of bulk SrAl 2O 4-Sr 3Al 2O 6 eutectic glass with wide-band optical window. NANOTECHNOLOGY 2018; 29:244002. [PMID: 29578456 DOI: 10.1088/1361-6528/aab983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
SrAl2O4-Sr3Al2O6 eutectic glass was prepared by using an aerodynamic levitator equipped with a CO2 laser device. A bulk transparent amorphous sample was obtained by the spark plasma sintering (SPS) of the prepared eutectic glass. XRD, a UV-vis-NIR spectrophotometer and FT-IR were employed to characterize the phase evolution and optical properties. The results show that the bulk SrAl2O4-Sr3Al2O6 samples fabricated by the containerless process and SPS between 852 °C-857 °C were fully amorphous. The amorphous sample has a wide transparent window between 270 nm and 6.2 μm. The average refractive index in the visible light region is 1.680 and the Abbe number is 27.4. The prepared bulk SrAl2O4-Sr3Al2O6 eutectic glass with the wide-band optical window may be a promising candidate for optical applications.
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Affiliation(s)
- Jiaxi Liu
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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