|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
||Interfacial Reaction in Ag/Se, Ag/Te, Ag2Te/Se and Ag2Te/Se-30at.%Te Couples and Their Related Phase Diagram
||Yohanes Hutabalian, Sinn-wen Chen
|On-Site Speaker (Planned)
Ag-Se-Te is an important material system for thermoelectric applications. Various compounds in this system, such as Ag2Te, Ag2Se and Ag2Se1-xTex are promising thermoelectric materials. The reaction couples of Ag/Te, Ag/Se, Ag2Te/Se and Ag2Te/Se-30at.%Te at 350oC are prepared and examined. In all the couples, the diffusion rate of Ag is much greater than those of Se and Te. Ag2Te and Ag5Te phases are formed in the Ag/Te couple and the reaction diffusion is very fast. The isothermal sections of Ag-Se-Te ternary system at 400oC, 350℃, 300oC and 250oC are determined. No ternary compound is observed and the Ag2Te-Ag2Se is a continuous solid solution phase, Ag2(Se,Te). The related reaction paths and mass balances of the reaction couples are well explained using the determined phase diagram.