PHYSICO-CHEMICAL STUDY OF PHASE EQUILIBRIUM AND GLASS FORMATION IN THE As2Se3-TlPr2Se4 SYSTEM AND STUDY OF ELECTRICAL CONDUCTIVITY OF GLASSY ALLOYS

Abstract Using physicochemical methods of analysis (DTA, MSA, X-ray diffraction, as well as determination of microhardness and density), the phase equilibrium in the As2Se3-TlPr2Se4 system was studied and its T-x phase diagram was constructed. As a result, it was found that the As2Se3-TlPr2Se4 system is quasi-binary and belongs to the eutectic type. The eutectic formed between the As2Se3 and TlPr2Se4 compounds has a composition of 10 mol. % TlPr2Se4 and a temperature of 270oC. It was found that the solubility of the system is 2 mol. % TlPr2Se based on the As2Se3 compound and 3.5 mol. % As2Se3 based on the TlPr2Se4 compound at room temperature. The glassy field of 15 mol. % TlPr2Se4 was determined based on As2Se3 upon slow cooling in the system. The temperature dependence of electrical conductivity of 5, 10 and 15 mol. % TlPr2Se4 glass alloys based on As2Se3 was studied.