THERMODYNAMIC STUDY OF SILVER-SILICON SELENIDES (TELLURIDES) BY THE EMF METHOD WITH AG4RBI5 SOLID ELECTROLYTE

Abstract

The Ag2Se-SiSe2-Se subsystem of the Ag-Si-Se system was studied in the 360-450 K temperature range, while the Ag2Te-Si2Te3-Te subsystem of the Ag-Si-Te system was studied in the 300-450K temperature range by the EMF (Electromotive Force) method with Ag4RbI5 solid electrolyte. It was observed that the dependence of EMF on temperature was linear in the samples prepared for both systems. Partial thermodynamic functions of silver in alloys of Ag-Si-Se(Te) systems, as well as standard integral thermodynamic functions of ternary compounds Ag8SiSe6 and Ag8SiTe6 were calculated based on the results of EMF measurements. Besides, standard integral thermodynamic functions of β-Ag8SiSe6 were calculated both under standard conditions and at 400 K.