Ag-Bi-Te体系的相图热力学研究

doi:10.19976/j.cnki.43-1448/TF.2026024

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摘要本研究采用相图计算(calculation of phase diagram, CALPHAD)方法,结合文献现有的实验数据,对Ag-Bi-Te体系进行热力学建模。考虑到液相中存在Ag₂Te和Bi₂Te₃缔合物,液相采用缔合物模型(Ag,Ag₂Te,Bi,Bi₂Te₃,Te)₁描述。AgBiTe₂三元化合物则采用化学计量比模型(Ag)_0.25(Bi)_0.25(Te)_0.5描述。由此获得了一套自洽的Ag-Bi-Te体系热力学参数。对比计算结果与现有实验数据发现,本研究获得的热力学参数可以很好地描述Ag-Bi-Te三元系的相平衡关系和热力学性质。

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	魏鹏
	汪炯
	崔东宇
	周佳强

关键词 ： Ag-Bi-Te, CALPHAD, 垂直截面, 相变材料, 热力学评估

Abstract：Thermodynamic modelling of the Ag-Bi-Te system has been carried out using the calculation of phase diagram (CALPHAD) method based on the available literature-reported experimental data. The liquid phase was described by the associated compound model (Ag,Ag₂Te,Bi,Bi₂Te₃,Te)₁ with Ag₂Te and Bi₂Te₃ associate species. The ternary compound AgBiTe₂ was treated as the stoichiometric compound (Ag)_0.25(Bi)_0.25(Te)_0.5. A set of consistent thermodynamic parameters for the Ag-Bi-Te system was obtained. Comparison of the calculated results with available experimental data suggests that the thermodynamic parameters obtained in this study can well describe the phase equilibrium and thermodynamic properties of the Ag-Bi-Te ternary system.

Key words： Ag-Bi-Te CALPHAD vertical section phase change material thermodynamic assessment

收稿日期: 2026-02-25 出版日期: 2026-11-12

ZTFLH:

TB34

基金资助:国家自然科学基金资助项目(52171024); 湖南省自然科学基金资助项目(2022JJ30711)

通讯作者: 汪炯,教授,博士。电话：18229830732;E-mail: wangjionga@csu.edu.cn

引用本文:

魏鹏, 汪炯, 崔东宇, 周佳强. Ag-Bi-Te体系的相图热力学研究[J]. 粉末冶金材料科学与工程, 2026, 31(5): 486-497.
WEI Peng, WANG Jiong, CUI Dongyu, ZHOU Jiaqiang. Thermodynamic investigation of the Ag-Bi-Te system[J]. Materials Science and Engineering of Powder Metallurgy, 2026, 31(5): 486-497.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2026024 或 http://pmbjb.csu.edu.cn/CN/Y2026/V31/I5/486

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