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Guo J, Chan CK. Lithium Dendrite Propagation in Ta-Doped Li 7La 3Zr 2O 12 (LLZTO): Comparison of Reactively Sintered Pyrochlore-to-Garnet vs LLZTO by Solid-State Reaction and Conventional Sintering. ACS Appl Mater Interfaces 2024; 16:4519-4529. [PMID: 38233079 DOI: 10.1021/acsami.3c11421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Ta-doped Li7La3Zr2O12 (LLZTO) garnet is a promising Li-ion-conducting ceramic electrolyte for solid-state batteries. However, it is still challenging to use LLZTO in Li metal batteries operating at high current densities because of the tendency for Li metal to nucleate and propagate along the grain boundaries. In this study, we carry out a detailed investigation to elucidate the effect of microstructure and grain size on the electrochemical properties and short circuit behavior in LLZTO. Pellets were prepared using reactive sintering from pyrochlore precursors (a method called pyrochlore-to-garnet, P2G) and compared with LLZTO synthesized using solid-state reaction (SSR) followed by conventional pressureless sintering. Both preparation methods were controlled to keep the phase and elemental composition, ionic and electronic conductivity, relative density, and area-specific resistance of the pellets constant. Reflection electron energy loss spectroscopy and X-ray photoelectron spectroscopy confirm that both types of LLZTO have similar band gaps and chemical states. Microstructure analysis shows that the P2G method results in LLZTO with an average grain size of around 3 μm, which is much smaller than the grain sizes (as large as 20 μm) seen in SSR LLZTO. Galvanostatic Li stripping/plating and linear sweep voltammetry measurements show that P2G LLZTO can withstand higher critical current densities (up to 0.4 mA/cm2 in bidirectional cycling and >1 mA/cm2 for unidirectional) than those seen in SSR LLZTO. Post-mortem examination reveals much less Li deposition along the grain boundaries of P2G LLZTO, particularly in the bulk of the pellet, compared to SSR LLZTO after cycling. The improved cycling behavior in P2G LLZTO despite the higher grain boundary area could be from more homogeneous current density at the interfaces and different grain boundary properties arising from the liquid-phase, reactive sintering method. These results suggest that the effect of grain size on Li dendrite propagation in LLZO may be highly dependent on the synthesis and sintering method employed.
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Affiliation(s)
- Jinzhao Guo
- Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, P.O. Box 876106, Tempe, Arizona 85827, United States
| | - Candace K Chan
- Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, P.O. Box 876106, Tempe, Arizona 85827, United States
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Liu D, Zhu B, Feng J, Ling Y, Zhou J, Qiu G, Zhou M, Li J, Hou X, Ren B, Huang Y, Liu R. High Thermoelectric Performance of p-Type Bi 0.4Sb 1.6Te 3+x Synthesized by Plasma-Assisted Ball Milling. ACS Appl Mater Interfaces 2022; 14:54044-54050. [PMID: 36413600 DOI: 10.1021/acsami.2c16646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The exploration of new synthesis methods is important for the improvement of the thermoelectric property of a material for the different mechanisms of microstructure fabrication, surface activity modulation, and particle refinement. Herein, we prepared p-Bi2Te3 bulk materials by a simple synthesis method of the plasma-assisted ball milling, which yielded finer nanopowders, higher texture of in-plane direction, and higher efficiency compared to the traditional ball milling, favoring the simultaneous improvement of electrical and thermal properties. When combined with the Te liquid sintering, nano-/microscale hierarchical pores were fabricated and the carrier mobility was also increased, which together resulted in the low lattice thermal conductivity of 0.52 W·m-1·K-1 and the high power factor of 43.4 μW·cm-1·K-2 at 300 K, as well as the ranking ahead zT of 1.4@375 K. Thus, this work demonstrated the advantages of plasma-assisted ball milling in highly efficient synthesis of p-type Bi2Te3 with promising thermoelectric performance, which can also be utilized to prepare other thermoelectric materials.
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Affiliation(s)
- Duo Liu
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
- College of Materials Science and Engineering, Shenzhen University, Shenzhen518060, China
| | - Bangrui Zhu
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Jianghe Feng
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Yifeng Ling
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Jing Zhou
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Guojuan Qiu
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Menghui Zhou
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Juan Li
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
| | - Xufeng Hou
- China Electronics Technology Group Corporation, 18th Research Institute, Tianjin300000, China
| | - Baoguo Ren
- China Electronics Technology Group Corporation, 18th Research Institute, Tianjin300000, China
| | - Yang Huang
- College of Materials Science and Engineering, Shenzhen University, Shenzhen518060, China
| | - Ruiheng Liu
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen518055, China
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Olmos L, Gonzaléz-Pedraza AS, Vergara-Hernández HJ, Chávez J, Jimenez O, Mihalcea E, Arteaga D, Ruiz-Mondragón JJ. Ti64/20Ag Porous Composites Fabricated by Powder Metallurgy for Biomedical Applications. Materials (Basel) 2022; 15:ma15175956. [PMID: 36079338 PMCID: PMC9457260 DOI: 10.3390/ma15175956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 05/14/2023]
Abstract
We present a novel Ti64/20Ag highly porous composite fabricated by powder metallurgy for biomedical applications and provide an insight into its microstructure and mechanical proprieties. In this work, the Ti64/20Ag highly porous composites were successfully fabricated by the space holder technique and consolidated by liquid phase sintering, at lower temperatures than the ones used for Ti64 materials. The sintering densification was evaluated by dilatometry tests and the microstructural characterization and porosity features were determined by scanning electron microscopy and computed microtomography. Permeability was estimated by numerical simulations on the 3D real microstructure. Mechanical properties were evaluated by simple compression tests. Densification was achieved by interparticle pore filling with liquid Ag that does not drain to the large pores, with additional densification due to the macroscopical deformation of large pores. Pore characteristics are closely linked to the pore formers and the permeability was highly increased by increasing the pore volume fraction, mainly because the connectivity was improved. As expected, with the increase in porosity, the mechanical properties decreased. These results permitted us to gain a greater understanding of the microstructure and to confirm that we developed a promising Ti64/20Ag composite, showing E of 7.4 GPa, σy of 123 MPa and permeability of 3.93 × 10-11 m2. Enhanced adaptability and antibacterial proprieties due to Ag were obtained for bone implant applications.
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Affiliation(s)
- Luis Olmos
- INICIT, Universidad Michoacana de San Nicolás de Hidalgo, Fco. J. Mujica S/N, Morelia C.P. 58060, Mexico
| | - Ana S. Gonzaléz-Pedraza
- División de Estudios de Posgrado e Investigación, Tecnológico Nacional de México/I.T. Morelia, Av. Tecnológico #1500, Colonia Lomas de Santiaguito, Morelia C.P. 58120, Mexico
| | - Héctor J. Vergara-Hernández
- División de Estudios de Posgrado e Investigación, Tecnológico Nacional de México/I.T. Morelia, Av. Tecnológico #1500, Colonia Lomas de Santiaguito, Morelia C.P. 58120, Mexico
- Correspondence:
| | - Jorge Chávez
- Departamento de Ingeniería Mecánica Eléctrica, CUCEI, Universidad de Guadalajara, Blvd. Marcelino García Barragán # 1421, Guadalajara C.P. 44430, México
| | - Omar Jimenez
- Departamento de Ingeniería de Proyectos, Universidad de Guadalajara, José Guadalupe Zuno # 48, Los Belenes, Zapopan C.P. 45100, Mexico
| | - Elena Mihalcea
- División de Estudios de Posgrado e Investigación, Tecnológico Nacional de México/I.T. Morelia, Av. Tecnológico #1500, Colonia Lomas de Santiaguito, Morelia C.P. 58120, Mexico
| | - Dante Arteaga
- Centro de Geociencias, Universidad Nacional Autónoma de México, Blvd. Juriquilla No. 3001, Querétaro C.P. 76230, Mexico
| | - José J. Ruiz-Mondragón
- Corporación Mexicana de Investigación en Materiales SA de CV, Calle Ciencia y Tecnología 790, Fracc. Saltillo 400, Saltillo C.P. 25290, Mexico
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Rodrigues LM, Marinkovic BA. Effects of Fused Silica Addition on Thermal Expansion, Density, and Hardness of Alumix-231 Based Composites. Materials (Basel) 2022; 15:3476. [PMID: 35629504 DOI: 10.3390/ma15103476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/06/2022] [Accepted: 05/09/2022] [Indexed: 12/10/2022]
Abstract
Fused silica is a ceramic with promising applications as a filler in composites due to its near-zero thermal expansion. Substitution of heavy cast iron with Al-based light alloys is of utmost importance for the automotive industry. However, the high thermal expansion of Al alloys is an obstacle to their use in some applications. As such, ceramic fillers are natural candidates for tuning thermal expansion of Al-based matrices, due to their inherently moderate or low thermal expansion. Alumix-231 is a new promising alloy, and fused silica has never been used before to lower its thermal expansion. Composites with the addition of 5 to 20 vol.% of fused silica were developed through powder metallurgy, and the best results in terms of reduction of thermal expansion were reached after liquid phase sintering at 565 °C. Coefficients of thermal expansion as low as 13.70 and 12.73 × 10−6 °C−1 (between 25 and 400 °C) were reached for the addition of 15 and 20 vol.% of fused silica, a reduction of 29.9% and 34.8%, respectively, in comparison to neat Alumix-231. In addition, the density and hardness of these composites were not significantly affected, since they suffered only a small decrease, no higher than 6% and 5%, respectively. As such, the obtained results showed that Alumix-231/fused silica composites are promising materials for automotive applications.
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Skoczylas P, Kaczorowski M. Preliminary Study of the Rhenium Addition on the Structure and Mechanical Properties of Tungsten Heavy Alloy. Materials (Basel) 2021; 14:7365. [PMID: 34885520 DOI: 10.3390/ma14237365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 11/16/2022]
Abstract
The results of structure and mechanical property investigations of tungsten heavy alloy (THA) with small additions of rhenium powder are presented. The material for the study was prepared using liquid phase sintering (LPS) of mixed and compacted powders in a hydrogen atmosphere. From the specimens, the samples for mechanical testing and structure investigations were prepared. It follows from the results of the microstructure observations and mechanical studies, that the addition of rhenium led to tungsten grain size decreasing and influencing the mechanical properties of W-Ni-Fe-Co base heavy alloy.
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Skoczylas P, Goroch O, Gulbinowicz Z, Penkul A. The Effect of Cold Swaging of Tungsten Heavy Alloy with the Composition W91-6Ni-3Co on the Mechanical Properties. Materials (Basel) 2021; 14:7300. [PMID: 34885453 DOI: 10.3390/ma14237300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 11/24/2021] [Accepted: 11/25/2021] [Indexed: 11/17/2022]
Abstract
The paper presents the results of studies on the effects of heat treatment and cold-work parameters on the mechanical properties and microstructure of the tungsten heavy alloy (WHA) with the composition W91-6Ni-3Co. Tungsten heavy alloy (WHA) is used in conditions where strength, high density, and weight are required. The material for testing as rod-shaped samples was produced by the method of powder metallurgy and sintering with the participation of the liquid phase and then subjected to heat treatment and cold swaging. The study compares the effect of degree deformation on the strength, hardness, microhardness, and microstructure of WHA rods. The conducted tests showed that heat treatment and cold-work allowed to gradually increase the strength parameters, i.e., tensile strength σuts, yield strength σys, elongation ε, hardness, and microhardness. These processes made it possible to increase the tensile strength by over 800 MPa (from the initial 600 MPa after sintering to the final value of over 1470 MPa after heat treatment with cold swaging deformation with reduction of 30%) and the hardness from 32 to 46 HRC.
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Oh JAS, He L, Plewa A, Morita M, Zhao Y, Sakamoto T, Song X, Zhai W, Zeng K, Lu L. Composite NASICON (Na 3Zr 2Si 2PO 12) Solid-State Electrolyte with Enhanced Na + Ionic Conductivity: Effect of Liquid Phase Sintering. ACS Appl Mater Interfaces 2019; 11:40125-40133. [PMID: 31592636 DOI: 10.1021/acsami.9b14986] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
NASICON-type of solid-state electrolyte, Na3Zr2Si2PO12 (NZSP), is one of the potential solid-state electrolytes for all-solid-state Na battery and Na-air battery. However, in solid-state synthesis, high sintering temperature above 1200 °C and long duration are required, which led to loss of volatile materials and formation of impurities at the grain boundaries. This hampers the total ionic conductivity of NZSP to be in the range of 10-4 S cm-1. Herein, we have reduced both the sintering temperature and time of the NZSP electrolyte by sintering the NZSP powders with different amounts of Na2SiO3 additive, which provides the liquid phase for the sintering process. The addition of 5 wt % Na2SiO3 has shown the highest total ionic conductivity of 1.45 mS cm-1 at room temperature. A systematic study of the effect of Na2SiO3 on the microstructure and electrical properties of the NZSP electrolyte is conducted by the structural study with the help of morphological and chemical observations using X-ray diffraction (XRD), scanning electron microscopy, and using focused ion-beam-time of flight-secondary ion mass spectroscopy. The XRD results revealed that cations from Na2SiO3 diffused into the bulk change the stoichiometry of NZSP, leading to an enlarged bottleneck area and hence lowering activation energy in the bulk, which contributes to the increment of the bulk ion conductivity, as indicated by the electrochemical impedance spectroscopy result. In addition, higher density and better microstructure contribute to improved grain boundary conductivity. More importantly, this study has achieved a highly ionic conductive NZSP only by facile addition of Na2SiO3 into the NZSP powder prior to the sintering stage.
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Affiliation(s)
- Jin An Sam Oh
- Department of Mechanical Engineering , National University of Singapore , Singapore 117575 , Singapore
- Graduate School for Integrative Sciences and Engineering , National University of Singapore , Singapore 138632 , Singapore
- Singapore Institute of Manufacturing Technology , A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way , Innovis 138634 , Singapore
| | - Linchun He
- Department of Mechanical Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Anna Plewa
- Department of Mechanical Engineering , National University of Singapore , Singapore 117575 , Singapore
- Faculty of Energy and Fuels , AGH University of Science and Technology , al. Mickiewicza 30 , Krakow 30-059 , Poland
| | | | | | | | - Xu Song
- Department of Mechanical and Automation Engineering , Chinese University of Hong Kong , William M. W. Mong Engineering Building, Chung Chi Road , Ma Liu Shui , HKSAR
| | - Wei Zhai
- Singapore Institute of Manufacturing Technology , A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way , Innovis 138634 , Singapore
| | - Kaiyang Zeng
- Department of Mechanical Engineering , National University of Singapore , Singapore 117575 , Singapore
| | - Li Lu
- Department of Mechanical Engineering , National University of Singapore , Singapore 117575 , Singapore
- National University of Singapore (Suzhou) Research Institute , Suzhou 215123 , P. R. China
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Skałoń M, Buzolin R, Kazior J, Sommitsch C, Hebda M. Improving the Dimensional Stability and Mechanical Properties of AISI 316L + B Sinters by Si 3N 4 Addition. Materials (Basel) 2019; 12:ma12111798. [PMID: 31163597 PMCID: PMC6600792 DOI: 10.3390/ma12111798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/27/2019] [Accepted: 05/29/2019] [Indexed: 11/21/2022]
Abstract
The following paper describes a new and effective method to obtain high-density sinters with simultaneously decreased distortions, produced by one press and sinter operation. This effect was achieved through the induced disappearance of the eutectic liquid phase. The study was carried out on AISI 316L stainless steel powder that was mixed with elemental boron and silicon nitride. Boron was used as a sintering process activator. The scientific novelty of this publication consists of the use of a silicon nitride as a solid-state nitrogen carrier that was intended to change the borides’ morphology by binding boron. Based on the thermodynamic calculations, 20 blends of various compositions were tested for physical properties, porosity, microstructure, and mechanical properties. Moreover, phase compositions for selected samples were analyzed. It was shown that the addition of silicon nitride as a nitrogen carrier decreases the boron-based eutectic phase volume and both increases the mechanical properties and decreases after-sintering distortions. An explanation of the observed phenomena was also proposed.
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Affiliation(s)
- Mateusz Skałoń
- IMAT Institute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/1, 8010 Graz, Austria.
- Institute of Materials Engineering, Cracow University of Technology, Cracow, 24 Warszawska ave, 31-155 Kraków, Poland.
| | - Ricardo Buzolin
- IMAT Institute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/1, 8010 Graz, Austria.
| | - Jan Kazior
- Institute of Materials Engineering, Cracow University of Technology, Cracow, 24 Warszawska ave, 31-155 Kraków, Poland.
| | - Christof Sommitsch
- IMAT Institute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/1, 8010 Graz, Austria.
| | - Marek Hebda
- Institute of Materials Engineering, Cracow University of Technology, Cracow, 24 Warszawska ave, 31-155 Kraków, Poland.
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Li Y, Wu H, Liu X, Huang Z. Microstructures and Properties of Porous Liquid-Phase-Sintered SiC Ceramic by Hot Press Sintering. Materials (Basel) 2019; 12:ma12040639. [PMID: 30791627 PMCID: PMC6416541 DOI: 10.3390/ma12040639] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/13/2019] [Accepted: 02/18/2019] [Indexed: 11/16/2022]
Abstract
Porous liquid-phase-sintered SiC (L-SiC) ceramics were successfully fabricated by hot press sintering (HP) at 1800 °C in argon, using Al2O3 and Y2O3 as oxide additions. By varying the starting coarse SiC particle size, the relationships between pore microstructures and flexural strength as well as gas permeability of porous L-SiC were examined. All the as-sintered samples possessed homogeneous interconnected pores. The porosity of porous L-SiC decreased from 34.0% to 25.9%, and the peak pore size increased from 1.1 to 3.8 μm as the coarse SiC particle sizes increased. The flexural strengths of porous L-SiC ceramics at room temperature and 1000 °C were as high as 104.3 ± 7.3 MPa and 78.8 ± 5.1 MPa, respectively, though there was a decrease in accordance with their increasing pore sizes and particle sizes. Moreover, their gas permeability increased from 1.4 × 10−14 m2 to 4.6 × 10−14 m2 with the increase of pore size in spite of their decreased porosity.
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Affiliation(s)
- Yajie Li
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
| | - Haibo Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
- Suzhou Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Suzhou 215411, China.
| | - Xuejian Liu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Zhengren Huang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
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Pan Y, Aydemir U, Grovogui JA, Witting IT, Hanus R, Xu Y, Wu J, Wu CF, Sun FH, Zhuang HL, Dong JF, Li JF, Dravid VP, Snyder GJ. Melt-Centrifuged (Bi,Sb) 2 Te 3 : Engineering Microstructure toward High Thermoelectric Efficiency. Adv Mater 2018; 30:e1802016. [PMID: 29984538 DOI: 10.1002/adma.201802016] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/27/2018] [Indexed: 06/08/2023]
Abstract
Microstructure engineering is an effective strategy to reduce lattice thermal conductivity (κl ) and enhance the thermoelectric figure of merit (zT). Through a new process based on melt-centrifugation to squeeze out excess eutectic liquid, microstructure modulation is realized to manipulate the formation of dislocations and clean grain boundaries, resulting in a porous network with a platelet structure. In this way, phonon transport is strongly disrupted by a combination of porosity, pore surfaces/junctions, grain boundaries, and lattice dislocations. These collectively result in a ≈60% reduction of κl compared to zone melted ingot, while the charge carriers remain relatively mobile across the liquid-fused grains. This porous material displays a zT value of 1.2, which is higher than fully dense conventional zone melted ingots and hot pressed (Bi,Sb)2 Te3 alloys. A segmented leg of melt-centrifuged Bi0.5 Sb1.5 Te3 and Bi0.3 Sb1.7 Te3 could produce a high device ZT exceeding 1.0 over the whole temperature range of 323-523 K and an efficiency up to 9%. The present work demonstrates a method for synthesizing high-efficiency porous thermoelectric materials through an unconventional melt-centrifugation technique.
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Affiliation(s)
- Yu Pan
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Umut Aydemir
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Koc University, Sariyer, Istanbul, -34450, Turkey
| | - Jann A Grovogui
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Ian T Witting
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Riley Hanus
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yaobin Xu
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Jinsong Wu
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- NUANCE Center, Northwestern University, Evanston, IL, 60208, USA
| | - Chao-Feng Wu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Fu-Hua Sun
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Hua-Lu Zhuang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Jin-Feng Dong
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Jing-Feng Li
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - G Jeffrey Snyder
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
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Liu Y, Zhang Y, Ortega S, Ibáñez M, Lim KH, Grau-Carbonell A, Martí-Sánchez S, Ng KM, Arbiol J, Kovalenko MV, Cadavid D, Cabot A. Crystallographically Textured Nanomaterials Produced from the Liquid Phase Sintering of Bi xSb 2- xTe 3 Nanocrystal Building Blocks. Nano Lett 2018; 18:2557-2563. [PMID: 29546994 DOI: 10.1021/acs.nanolett.8b00263] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Bottom-up approaches for producing bulk nanomaterials have traditionally lacked control over the crystallographic alignment of nanograins. This limitation has prevented nanocrystal-based nanomaterials from achieving optimized performances in numerous applications. Here we demonstrate the production of nanostructured Bi xSb2- xTe3 alloys with controlled stoichiometry and crystallographic texture through proper selection of the starting building blocks and the adjustment of the nanocrystal-to-nanomaterial consolidation process. In particular, we hot pressed disk-shaped Bi xSb2- xTe3 nanocrystals and tellurium nanowires using multiple pressure and release steps at a temperature above the tellurium melting point. We explain the formation of the textured nanomaterials though a solution-reprecipitation mechanism under a uniaxial pressure. Additionally, we further demonstrate these alloys to reach unprecedented thermoelectric figures of merit, up to ZT = 1.96 at 420 K, with an average value of ZTave = 1.77 for the record material in the temperature range 320-500 K, thus potentially allowing up to 60% higher energy conversion efficiencies than commercial materials.
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Affiliation(s)
- Yu Liu
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Yu Zhang
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Silvia Ortega
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
| | - Maria Ibáñez
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Khak Ho Lim
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Hong Kong , China
| | - Albert Grau-Carbonell
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Campus UAB, Bellaterra, 08193 Barcelona , Catalonia , Spain
| | - Sara Martí-Sánchez
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Campus UAB, Bellaterra, 08193 Barcelona , Catalonia , Spain
| | - Ka Ming Ng
- Department of Chemical and Biological Engineering , Hong Kong University of Science and Technology , Hong Kong , China
| | - Jordi Arbiol
- Catalan Institute of Nanoscience and Nanotechnology (ICN2) , CSIC and BIST , Campus UAB, Bellaterra, 08193 Barcelona , Catalonia , Spain
- ICREA , Pg. Lluis Companys 23 , 08010 Barcelona , Spain
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Doris Cadavid
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
- Departamento de Física , Universidad Nacional de Colombia , 111321 Ciudad Universitaria, Bogotá , Colombia
| | - Andreu Cabot
- Catalonia Energy Research Institute - IREC , Sant Adria de Besòs , 08930 Barcelona , Spain
- ICREA , Pg. Lluis Companys 23 , 08010 Barcelona , Spain
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Duan S, Feng P, Gao C, Xiao T, Yu K, Shuai C, Peng S. Microstructure Evolution and Mechanical Properties Improvement in Liquid-Phase-Sintered Hydroxyapatite by Laser Sintering. Materials (Basel) 2015; 8:1162-1175. [PMID: 28787994 PMCID: PMC5455430 DOI: 10.3390/ma8031162] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/04/2015] [Accepted: 03/11/2015] [Indexed: 11/29/2022]
Abstract
CaO-Al₂O₃-SiO₂ (CAS) as a liquid phase was introduced into hydroxyapatite (HAp) to prepare bone scaffolds. The effects of the CAS content (1, 2, 3, 4 and 5 wt%) on microstructure and mechanical properties of HAp ceramics were investigated. The optimal compression strength, fracture toughness and Vickers hardness reached 22.22 MPa, 1.68 MPa·m1/2 and 4.47 GPa when 3 wt% CAS was added, which were increased by 105%, 63% and 11% compared with those of HAp ceramics without CAS, respectively. The improvement of the mechanical properties was attributed to the improved densification, which was caused by the solid particle to rearrange during liquid phase sintering. Moreover, simulated body fluid (SBF) study indicated the HAp ceramics could maintain the mechanical properties and form a bone-like apatite layer when they were immersed in SBF. Cell culture was used to evaluate biocompatibility of the HAp ceramics. The results demonstrated MG-63 cells adhered and spread well.
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Affiliation(s)
- Songlin Duan
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, China.
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Tao Xiao
- Orthopedic Biomedical Materials Institute, Central South University, Changsha 410083, China.
- Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
| | - Kun Yu
- School of Materials Science and Engineering, Central South University, Changsha 410083, China.
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
- Orthopedic Biomedical Materials Institute, Central South University, Changsha 410083, China.
| | - Shuping Peng
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, China.
- School of Basic Medical Science, Central South University, Changsha 410078, China.
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