Phase diagrams of the thermoelectric Bi–Sb–Se system
Source abstract
Abstract
Bi–Sb–Se is an important thermoelectric material system. However, a phase diagram of the entire compositional range is not available in the literature. This study determines the Bi–Sb–Se liquidus projection and its phase equilibria isothermal section at 400 °C. Ternary Bi–Sb–Se alloys are prepared. Their primary solidification phases and invariant reactions are determined. There are seven primary solidification phases, (Se), Bi2Se3, Sb2Se3, (Bi,Sb), ( B i 2 ) m ( B i 2 S e 3 ) n , Bi3Sb5Se2 and Bi3Sb12Se5. Both Bi3Sb5Se2 and Bi3Sb12Se5 are newly found ternary compounds. In the Bi–Sb–Se isothermal section at 400 °C, there are eight three-phase regions. Besides these two ternary compounds, the other single phases are, Sb2Se3, Bi2Se3, ( B i 2 ) m ( B i 2 S e 3 ) n , Liquid (Bi,Sb), Liquid (Se), and (Bi,Sb) phases. It has been found the solubilities of Sb in the ( B i 2 ) m ( B i 2 S e 3 ) n and Bi2Se3 compounds are significant.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Thermodynamics and Statistical Mechanics · Thermal Radiation and Cooling Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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