Дослідження фізико-хімічної взаємодії в системах CuInS2–"P2S4" та CuInSe2–"P2Se4"

Abstract

In order to determine melting character of the CuInP2S6 and CuInP2Se6 quaternary compounds and investigate physical-chemical interaction, the phase equilibria in the CuInS2 – “P2S4” and CuInSe2 – “P2Se4” systems have been established using differential thermal analysis and X-ray powder diffraction. Quaternary thiohypodiphosphate CuInP2S6 is formed by syntactic reaction from two liquids L1+L2 at the temperature -1088±5 К. The eutectic composition (75 mol.% CuInS2 ) exist in the CuInS2 – “P2S4” system, temperature of eutectic line - 1058±5 К. Compound CuInP2Se6 melts congruently at the 925±5 К and forms eutectic with ~92 mol. % CuInSe2. The concentration limits of the CuInP2Se6 homogeneity region at the eutectic temperature ( 885±5 К) are from 65 mol. %. to 50 mol. %. CuInSe2 .