Zn1+xSb二元体系的相形成和热电性能

• Published in: 中国有色金属学报（英文版） Vol. 31; no. 3; pp. 753 - 763
• Main Authors: Ahmad OSTOVARI MOGHADDAM, Evgeny TROFIMOV, Ting ZHANG, Jordi ARBIOL, Andreu CABOT
• Format: Journal Article
• Language: Chinese
• Published: Department of Materials Science,Physical and Chemical Properties of Materials,South Ural State University,76 Lenin Ave,Chelyabinsk,454080,Russia%Catalan Institute of Nanoscience and Nanotechnology(ICN2 ,Consejo Superior de Investigaciones Científicas(CSIC)and Barcelona Institute of Science and Technology(BIST),Campus Autonomous University of Barcelona(UAB),Bellaterra,08193 Barcelona,Spain%Catalonia Institute for Energy Research-IREC,Sant Adrià de Besòs,08930 Barcelona,Spain 2021; Catalan Institution for Research and Advanced Studies-ICREA,Pg. Lluís Companys 23,08010 Barcelona,Spain
• Subjects: ZnSb/β-Zn4Sb3复合材料; ZnSb/β-Zn4Sb3 composite; Zn1+xSb; thermoelectric properties; 热电性能; 热稳定性; thermal stability
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(21)65536-X

在Zn?Sb二元相图固相线以下使Zn和Sb粉末反应并随炉冷却,合成一系列Zn1+xSb(x=0,0.05,0.1,0.15,0.25,0.3)材料,分析Zn–Sb相图中心区域的相形成和热电性能.在此过程中,非化学计量比的混合粉末结晶形成ZnSb和 β-Zn4Sb3相的组合.然后,将材料研磨并热压成致密的ZnSb/β-Zn4Sb3复合材料.X射线衍射、高分辨率透射电镜和电子能量损失谱分析均未发现Sb、Zn元素或其他相.所有材料的热电性能都可以归结为ZnSb和β-Zn4Sb3相的热电行为的结合,并由每种材料中的主相所决定,Zn1.3Sb复合材料具有最好的热电性能.研究发现,Ge掺杂可大幅增加Zn1.3Sb的Seebeck系数且显著提高其功率因数,540 K时达1.51 mW·m?1·K?2.总之,Zn1.28Ge0.02Sb具有优异、稳定的ZT值,650 K时为1.17.