Thermodynamic Evaluation and Optimization of the Ag-As-S system

Abstract A critical evaluation of all available phase diagram and thermodynamic data has been performed for Ag-As, Ag-S, As-S Ag-As-S systems, including a detailed review the gaseous species involved in system. Thermodynamic assessments over whole composition range these four systems are presented using CALPHAD method. To predict properties equilibria, Modified Quasichemical Model short ordering was used liquid phases, Compound Energy Formalism solid solutions. For binary system, natural logarithm terms temperature dependence excess Gibbs energy solution have used. This led to significant improvement compared with previous assessment this The optimization is good agreement existing experimental data.