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Li P, Xu X, Zhao J, Awasthi P, Qiao X, Du J, Fan X, Qian G. Lanthanide doped fluorosilicate glass-ceramics: A review on experimental and theoretical progresses. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.09.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Velázquez JJ, Gorni G, Balda R, Fernández J, Pascual L, Durán A, Pascual MJ. Non-Linear Optical Properties of Er 3+-Yb 3+-Doped NaGdF 4 Nanostructured Glass-Ceramics. NANOMATERIALS 2020; 10:nano10071425. [PMID: 32708192 PMCID: PMC7408096 DOI: 10.3390/nano10071425] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 11/25/2022]
Abstract
Transparent oxyfluoride glass–ceramics containing NaGdF4 nanocrystals were prepared by melt-quenching and doped with Er3+ (0.5 mol%) and different amounts of Yb3+ (0–2 mol%). The selected dopant concentration the crystallization thermal treatments were chosen to obtain the most efficient visible up-conversion emissions, together with near infrared emissions. The crystal size increased with dopant content and treatment time. NaGdF4 NCs with a size ranging 9–30 nm were obtained after heat treatments at Tg + 20–80 °C as confirmed by X-ray diffraction and high-resolution transmission electron microscopy. Energy dispersive X-ray analysis shows the incorporation of rare earth ions into the NaGdF4 nanocrystals. Near-infrared emission spectra, together with the up-conversion emissions were measured. The optical characterization of the glass–ceramics clearly shows that Er3+ and Yb3+ ions are incorporated in the crystalline phase. Moreover, visible up-conversion emissions could be tuned by controlling the nanocrystals size through appropriated heat treatment, making possible a correlation between structural and optical properties.
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Affiliation(s)
- José J. Velázquez
- Centre for Functional and Surface Functionalized Glass (FunGlass), Alexander Dubček University of Trenčín, 911 50 Trenčín, Slovakia
- Correspondence:
| | - Giulio Gorni
- Instituto de Cerámica y Vidrio, ICV-CSIC, 28049 Madrid, Spain; (G.G.); (A.D.); (M.J.P.)
| | - Rolindes Balda
- Applied Physic Department I, Superior School of Engineering, Basque Country University, 48013 Bilbao, Spain;
- Materials Physics Center CSIC-UPV/EHU, 20018 San Sebastian, Spain
| | - Joaquin Fernández
- Donostia International Physics Center (DIPC), 20018 San Sebastian, Spain;
| | - Laura Pascual
- Instituto de Catálisis y Petroleoquímica-CSIC, 28049 Madrid, Spain;
| | - Alicia Durán
- Instituto de Cerámica y Vidrio, ICV-CSIC, 28049 Madrid, Spain; (G.G.); (A.D.); (M.J.P.)
| | - Maria J. Pascual
- Instituto de Cerámica y Vidrio, ICV-CSIC, 28049 Madrid, Spain; (G.G.); (A.D.); (M.J.P.)
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Glass-Ceramics Processed by Spark Plasma Sintering (SPS) for Optical Applications. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10082791] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper presents a review on the preparation of glass-ceramics (GCs) and, in particular, transparent GCs by the advanced processing technique of spark plasma sintering (SPS). SPS is an important approach to obtain from simple to complex nanostructured transparent GCs, full densification in a short time, and highly homogeneous materials for optical applications. The influence of the different processing parameters, such as temperature, pressure, sintering dwell time on the shrinkage rate, and final densification and transparency, are discussed and how this affects the glass material properties. Normally, transparent glass-ceramics are obtained by conventional melt-quenching, followed by thermal treatment. Additionally, the GC scan is produced by sintering and crystallization from glass powders. Hot pressing techniques (HP) in which the source of heating is high-frequency induction can be also applied to enhance this process. In the case of transparent ceramics and glass-ceramics, spark plasma sintering is a promising processing tool. It is possible to enhance the material properties in terms of its compactness, porosities, crystallization, keeping the size of the crystals in the nanometric scale. Moreover, the introduction of a high concentration of active gain media into the host matrix provides functional glass-ceramics systems with enhanced luminescence intensity through reducing non-radiative transitions like multi phonon relaxation (MPR) and cross relaxations (CR), thus providing longer lifetimes. More effort is needed to better understand the sintering mechanisms by SPS in transparent GC systems and optimize their final optical performance.
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Hoell A, Raghuwanshi VS, Bocker C, Herrmann A, Rüssel C, Höche T. Crystallization of BaF 2 from droplets of phase separated glass – evidence of a core–shell structure by ASAXS. CrystEngComm 2020. [DOI: 10.1039/c9ce02003a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Glasses with the mol% compositions 1.88 Na2O·15.04 K2O·7.52 Al2O3·69.56 SiO2·6.00 BaF2 and 1.88 Na2O·15.03 K2O·7.52 Al2O3·69.52 SiO2·6.00 BaF2·0.05 SmF3 were studied using X-ray diffraction, transmission electron microscopy, and anomalous small-angle X-ray scattering.
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Affiliation(s)
- Armin Hoell
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- D-14109 Berlin
- Germany
| | - Vikram Singh Raghuwanshi
- Institute for Nanospectroscopy
- Helmholtz-Zentrum Berlin für Materialien und Energie
- D-14109 Berlin
- Germany
| | - Christian Bocker
- Otto-Schott-Institut
- Friedrich Schiller Universität Jena
- 07743 Jena
- Germany
| | - Andreas Herrmann
- Kazuo Inamori School of Engineering
- New York State College of Ceramics
- Alfred University
- Alfred
- USA
| | - Christian Rüssel
- Otto-Schott-Institut
- Friedrich Schiller Universität Jena
- 07743 Jena
- Germany
| | - Thomas Höche
- Optical Materials and Technologies
- Fraunhofer Institute for Microstructure of Materials and Systems IMWS
- D-06120 Halle
- Germany
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Gorni G, Velázquez JJ, Mosa J, Mather GC, Serrano A, Vila M, Castro GR, Bravo D, Balda R, Fernández J, Durán A, Castro Y. Transparent Sol-Gel Oxyfluoride Glass-Ceramics with High Crystalline Fraction and Study of RE Incorporation. NANOMATERIALS 2019; 9:nano9040530. [PMID: 30987125 PMCID: PMC6523291 DOI: 10.3390/nano9040530] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/20/2019] [Accepted: 03/26/2019] [Indexed: 11/16/2022]
Abstract
Transparent oxyfluoride glass-ceramic films and self-supported layers with composition 80SiO2-20LaF3 doped with Er3+ have been successfully synthesized by sol-gel process for the first time. Crack-free films and self-supported layer with a maximum thickness up to 1.4 µm were obtained after heat treatment at the low temperature of 550 °C for 1 min, resulting in a LaF3 crystal fraction of 18 wt%, as confirmed by quantitative Rietveld refinement. This is the highest value reported up to now for transparent oxyfluoride glass-ceramics prepared by sol-gel. This work provides a new synthesis strategy and opens the way to a wide range of potential applications of oxyfluoride glass-ceramics. The characterization by a wide range of techniques revealed the homogeneous precipitation of LaF3 nanocrystals into the glass matrix. X-ray absorption spectroscopy and electron paramagnetic resonance confirmed that the Er3+ ions are preferentially embedded in the low phonon-energy LaF3 nanocrystals. Moreover, photoluminescence (PL) measurements confirmed the incorporation of dopants in the LaF3 nanocrystals. The effective concentration of rare-earth ions in the LaF3 nanocrystals is also estimated by X-ray absorption spectroscopy.
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Affiliation(s)
- Giulio Gorni
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
| | - Jose J Velázquez
- FunGlass-Centre for Functional and Surface Functionalized Glass, Alexander Dubček University of Trenčín, Trenčín 91150, Slovakia.
| | - Jadra Mosa
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
| | - Glenn C Mather
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
| | - Aida Serrano
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
- SpLine, Spanish CRG Beamline-European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France.
| | - María Vila
- SpLine, Spanish CRG Beamline-European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France.
- Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain.
| | - Germán R Castro
- SpLine, Spanish CRG Beamline-European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France.
- Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain.
| | - David Bravo
- Departamento Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain.
| | - Rolindes Balda
- Departamento Física Aplica I, Escuela Superior de Ingeniería, Universidad del País Vasco (UPV-EHU), 48013 Bilbao, Spain.
- Centro de Física de Materiales, (UPV/EHU-CSIC), 20018 San Sebastian, Spain.
| | - Joaquín Fernández
- Donostia International Physics Center (DIPC), 20018 San Sebastian, Spain.
| | - Alicia Durán
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
| | - Yolanda Castro
- Instituto de Cerámica y Vidrio, CSIC, 28049 Madrid, Spain.
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Cabral AA, Balda R, Fernández J, Gorni G, Velázquez JJ, Pascual L, Durán A, Pascual MJ. Phase evolution of KLaF4 nanocrystals and their effects on the photoluminescence of Nd3+ doped transparent oxyfluoride glass-ceramics. CrystEngComm 2018. [DOI: 10.1039/c8ce00897c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantity of cubic (α-phase) and hexagonal (β-phase) KLaF4 nanocrystals (NCs) tailored by doping.
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Affiliation(s)
- A. A. Cabral
- Departamento de Física
- Instituto Federal do Maranhão – IFMA
- São Luis
- Brazil
| | - R. Balda
- Departamento de Física Aplicada I
- Escuela Superior de Ingeniería
- Universidad del País Vasco UPV-EHU
- Bilbao
- Spain
| | - J. Fernández
- Departamento de Física Aplicada I
- Escuela Superior de Ingeniería
- Universidad del País Vasco UPV-EHU
- Bilbao
- Spain
| | - G. Gorni
- Instituto de Cerámica y Vidrio (ICV-CSIC)
- 28049 Madrid
- Spain
| | | | - L. Pascual
- Instituto de Catálisis y Petroleoquímica (ICP-CSIC)
- 28049 Madrid
- Spain
| | - A. Durán
- Instituto de Cerámica y Vidrio (ICV-CSIC)
- 28049 Madrid
- Spain
| | - M. J. Pascual
- Instituto de Cerámica y Vidrio (ICV-CSIC)
- 28049 Madrid
- Spain
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7
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Guo Y, Zhao L, Fu Y, Dong P, Guo L, Yu H. Five-fold twinned β-PbF2 nanocrystals in oxyfluoride glass ceramics. RSC Adv 2018; 8:40787-40793. [PMID: 35557914 PMCID: PMC9091433 DOI: 10.1039/c8ra06194g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Accepted: 11/19/2018] [Indexed: 11/21/2022] Open
Abstract
Oxyfluoride glass ceramics (GCs) doped with trivalent lanthanide ions (Ln3+) have been prepared using a conventional melting–quenching method and studied by X-ray diffraction (XRD).
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Affiliation(s)
- Yuao Guo
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
| | - Lijuan Zhao
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
| | - Yuting Fu
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
| | - Pan Dong
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
| | - Liying Guo
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
| | - Hua Yu
- Key Laboratory of Weak-Light Nonlinear Photonics
- Ministry of Education
- School of Physics
- Nankai University
- Tianjin 300071
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de Pablos-Martín A, Ristic D, Durán A, Ferrari M, Pascual MJ. Crystallization and optical properties of Tm3+/Yb3+-co-doped KLaF4glass-ceramics. CrystEngComm 2017. [DOI: 10.1039/c6ce01845a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Lin C, Bocker C, Rüssel C. Nanocrystallization in Oxyfluoride Glasses Controlled by Amorphous Phase Separation. NANO LETTERS 2015; 15:6764-9. [PMID: 26313716 DOI: 10.1021/acs.nanolett.5b02605] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Transparent bulk glass-ceramics containing ZnF2, K2SiF6, and KZnF3 nanocrystals are successfully obtained from xKF-xZnF2-(100 - 2x)SiO2 oxyfluoride glasses for the first time to the best of our knowledge. The glass transition temperatures of heat-treated samples increase with time and approach values that resemble the temperatures chosen for thermal treatment. During nucleation and crystal growth, the residual glass around the crystals is depleted in fluoride which as glass component usually leads to a decrease in viscosity. The crystallization behavior notably depends on the glass composition and changes within a small range from x = 20 to 22.5 mol %. The occurrence of liquid/liquid phase separation in dependence of the composition is responsible for the physicochemical changes. Two different microstructures of droplet and interpenetrating phase separation and their compositional evolution are observed by replica transmission electron microscopy technique in the multicomponent glassy system. This study suggests that the size and crystal phase of precipitated crystallites can be controlled by the initial phase separation.
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Affiliation(s)
- Changgui Lin
- Otto-Schott-Institut für Materialforschung, Jena University , Fraunhoferstraβe 6, 07743 Jena, Germany
- Laboratory of Infrared Materials and Devices, Research Institute of Advanced Technology, Ningbo University , Ningbo 315211, China
| | - Christian Bocker
- Otto-Schott-Institut für Materialforschung, Jena University , Fraunhoferstraβe 6, 07743 Jena, Germany
| | - Christian Rüssel
- Otto-Schott-Institut für Materialforschung, Jena University , Fraunhoferstraβe 6, 07743 Jena, Germany
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