THERMODYNAMICS AND PHASE EQUILIBRIUM OF Cu－Y－O，Cu－Y－S，Cu－Y－O－S LIQUID SOLUTIONS

来源期刊：中国有色金属学报(英文版)1995年第3期

论文作者：Du, Ting Li, Guodong

文章页码：16 - 20

Key words：Y, O, S and Cu liquid; thermodynamic property; phase digram

Abstract: Thermodynamics of Cu-Y-O, Cu-Y-S and Cu-Y-O-S solutions at 1 200 ℃ were studied using solid electrolyte cell and chemical equilibrium method. The equilibrium constant of deoxidation,desulfurization and deoxysulfurization by Y, the Gibbs standard reaction free energies of the formation of Y₂O₃, YS and Y₂O₂S in Cu-base solution, activity interaction coefficients of S and Y, temperature dependence of standard free energy of solution of Y in Cu, self-interaction coefficients of Y in liquid Cu were obtained. The phase precipitation diagram for Cu-Y-O-S system was plotted. The thermodynamic condition of the existence of Y₂O₃, YS and Y₂O₂S in liquid Cu was determined.