欢迎访问《人工晶体学报》官方网站,今天是

人工晶体学报 ›› 2026, Vol. 55 ›› Issue (8): 1290-1296.DOI: 10.16553/j.cnki.issn1000-985x.2026.0056

• 研究论文 • 上一篇    下一篇

第一性原理研究反钙钛矿Sr3XO(X=Sb, Bi)化合物的声子热输运性质

尹伟1,2(), 张亚龙1, 杨顺铠1, 钱鸿福1, 马小强3, 马小红3, 李萍1,2()   

  1. 1.新疆理工学院理学院,阿克苏 843100
    2.新疆理工学院固态物理与量子精密测量实验室,阿克苏 843100
    3.宁夏师范大学物理与电子信息工程学院,固原 756099
  • 收稿日期:2026-04-03 出版日期:2026-08-20 发布日期:2026-08-26
  • 通信作者: 李萍,副教授。E-mail:1659681147@qq.com
  • 作者简介:尹伟(1990—),男,四川省人,副教授。E-mail:2016066@xjit.edu.cn
  • 基金资助:
    新疆维吾尔自治区大学生创新创业训练计划(S202513558048);新疆维吾尔自治区大学生创新创业训练计划(S202513558012);新疆理工学院校级科研项目(ZY202502)

First-Principles Study on Phonon Thermal Transport Properties of Anti-Perovskite Sr3XO (X = Sb, Bi) Compounds

YIN Wei1,2(), ZHANG Yalong1, YANG Shunkai1, QIAN Hongfu1, MA Xiaoqiang3, MA Xiaohong3, LI Ping1,2()   

  1. 1.School of Science,Xinjiang Institute of Technology,Aksu 843100,China
    2.Solid-State Physics and Quantum Precision Measurement Laboratory,Xinjiang Institute of Technology,Aksu 843100,China
    3.School of Physics and Electronic Information Engineering,Ningxia Normal University,Guyuan 756099,China
  • Received:2026-04-03 Online:2026-08-20 Published:2026-08-26

摘要: 本文采用半经典玻尔兹曼输运理论和第一性原理对两种反钙钛矿化合物Sr3XO(X=Sb,Bi)的热输运性质进行了深入研究。弹性常数和声子谱结果表明,Sr3SbO和Sr3BiO具有力学和动力学稳定性,其熔融温度分别为1 062.4和1 030.5 K。两种化合物能够在室温和高温条件下保持较低的晶格热导率(κL),300 K时,Sr3SbO和Sr3BiO的κL分别为1.472和3.122 W·m-1·K-1,尤其Sr3SbO的κL比经典热电材料PbTe(2.3 W·m-1·K-1)更低;700 K时,Sr3SbO和Sr3BiO的κL分别为0.671和1.343 W·m-1·K-1。相比Sr3BiO,Sr3SbO具有更强的非谐性。同时,本文还对两种化合物的热容、声子群速度和声子寿命进行了对比研究。本研究揭示了导致两种化合物低晶格热导率的微观机制,为后续设计具有低热导率的新型功能材料提供了理论依据。

关键词: 反钙钛矿化合物; Sr3XO(X=Sb, Bi); 力学性能; 晶格热导率; 声子热输运; 第一性原理

Abstract: Thermal transport properties of two antiperovskite compounds Sr3XO (X=Sb, Bi) were systematically investigated using semiclassical Boltzmann transport theory combined with first-principles calculations. The elastic constants and phonon spectra indicate that both Sr3XO (X=Sb, Bi) compounds exhibit mechanical and dynamical stability, with melting temperatures of 1 062.4 K and 1 030.5 K, respectively, broadening their potential applications under extreme conditions. Sr3SbO and Sr3BiO maintain low lattice thermal conductivity (κL) at both room and elevated temperatures. At 300 K, the κL values of Sr3SbO and Sr3BiO are 1.472 and 3.122 W·m-1·K-1, respectively, with Sr3SbO exhibiting a lower κL than the classic thermoelectric material PbTe (2.3 W·m-1·K-1). At 700 K, the κL values decrease to 0.671 and 1.343 W·m-1·K-1 for Sr3SbO and Sr3BiO, respectively. Compared with Sr3BiO, Sr3SbO exhibits stronger anharmonicity. Additionally, a comparative analysis of heat capacity, phonon group velocity, and phonon lifetime was conducted for both compounds. This study elucidates the microscopic mechanisms underlying the low lattice thermal conductivity in these compounds and provides theoretical insights for the future design of novel functional materials with low thermal conductivity.

Key words: anti-perovskite compound; Sr3XO(X=Sb, Bi); mechanical property; lattice thermal conductivity; phonon thermal transport; first-principle

中图分类号: