摘要
本文在二元溶体过剩焓和过剩熵都可以按组分的摩尔百分数展开成多项式的假设条件下,由热力学理论导出了确定二元系液一固两相平衡曲线的方程式。对于14种具有公共阳离子的碱卤化合物二元系,利用本文所导出的方程式,计算和讨论了它们的相图及其共晶点坐标,理论计算结果与实验结果能较好地吻合。
Suppose the excess enthalpy and entropy may be expanded as polynomials in the mole fractions, then according to the thermodynamic theory the equations of liquid-solid phase equilibrium curve of a binary system had been derived in this paper. For the 14 binary alkali halide systems having common cation, us-ing these equations we calculated and discussed their phase diagrams and positi-ons of eutectic points. The obtained results show that the agreement of the ca-lculated resu It with the experimental result is good.
关键词
碱卤化合物
二元系
热力学
相图
Thermodynamic theory
Binary system
Phase diagram
