|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXII
||C-10: Bi-Sb-Se-Te Phase Equilibria Isothermal Tetrahedron at 400℃
||Sinn-wen Chen, Cheng-chun Ching, Yohanes Hutabalian, Chia-chun Chen
|On-Site Speaker (Planned)
Bi-Sb-Se-Te is one of the most important material systems of thermoelectric applications. The Bi-Sb-Se-Te phase equilibria isothermal tetrahedron at 400℃ is examined in this study. The phase diagrams of its six constituent binary systems, Bi-Sb, Bi-Se, Bi-Te, Sb-Se, Sb-Te, and Se-Te are adopted from literature. The 400℃ phase equilibria isothermal sections of its four constituent ternary systems, Bi-Sb-Se, Bi-Sb-Te, Bi-Se-Te and Sb-Se-Te, are determined by assessment of related results in literature. Bi2Se3-Sb2Se3-Bi2Te3-Sb2Te3 isoplethal section of the 400℃ isothermal tetrahedron is experimentally determined. There are two phases, (Bi,Sb)2(Se,Te)3 and Sb2Se3, and most of the compositional regime is the (Bi,Sb)2(Se,Te)3 phase. The Bi-Sb-Se-Te phase equilibria isothermal tetrahedron at 400℃ is proposed based on the isothermal sections of its constituent ternary system and the experimental results of the quaternary system. A calphad modeling and phase diagram calculation is carrying out.
||Electronic Materials, Solidification, Phase Transformations