Ge-Si二元合金系的热力学

Thermodynamics of Ge-Si Alloy System

利用作者提出的二元相图数据计算活度的计算机程序CABPD(Calculating Activities from Binary Phase Diagrains),计算得到此体系液相及固相的热力学性质。表明此体系液、固相都呈正偏差,可以表示为: L_(Gm)(L)=7125X_(Si)X_(Ge)(J/mol) L_(Gm)(S)=4808X_(Si)X_(Ge)(J/mol)

No experimental therniodynamic properties of Ge-Si systemhave been reported in literature. But the phase diagram has been measured exactly many times. In this paper the thermody namic properties of Ge-Si system have been calculated from phase diagram by using computer program CABPD (Calculating Activities from Binary Phase Diagrams) presented by the author in a previous paper. The excess free energies in liquid and solid solution can be expressed as.and the activities of Ge and Si in liquid and solid solution have been also given. They show positive deviations from Raoult's law.