Isothermal section of the Pt–Sb–Te system at 800°C

Abstract

The phase relations in the system Pt–Sb–Te have been investigated at 800°C, using sealed glass capsule techniques. The reaction products have been studied by reflected light microscopy, X-ray diffraction, and electron probe microanalysis. At 800°C, platinum, PtSb, PtSb2, PtTe, Pt3Te4, Pt2Te3 and PtTe2 are the stable solid phases. There are two liquid phase fields: one liquid phase occurs in an area between 29 and 35 at.% on the Pt–Sb axis, the other as a thin strip along the Sb–Te axis. The extent of the solid solution in some phases is significant: 28.5 at.% Te, 10 at.% Te, and 19.5 at.% Sb for PtSb, PtSb2, and PtTe2, respectively.