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本文利用CaCl_2-SrCl_2相图中固相有一个溶解间断区(miscibility gap)的信息,用亚正规溶液模型计算了该二元系液相和固相的吉氏能。运用Toop方程的变通式,由组成NaCl-CaCl_2-SrCl_2三元系的二元系热力学性质预示了该三元系液相的吉氏能,进而用计算机计算了偏克分子吉氏能和活度系数。所有计算对于预示NaCl-CaCl_2-SrCl_2三元相图、钠电解和盐湖资源综合利用的实践是重要的。
In this paper, using the information of a miscibility gap in the solid phase of CaCl_2-SrCl_2 phase diagram, the Gibbs energy of liquid and solid phase of the binary system was calculated by using sub-normal solution model. By using the Toop equation, the Gibbs energy of the ternary liquid phase is predicted by the thermodynamic properties of the binary system composed of NaCl-CaCl_2-SrCl_2 ternary system, and then the Gibbs energy and activity coefficient. All the calculations are important for predicting the comprehensive utilization of ternary phase diagram of NaCl-CaCl 2-SrCl 2, sodium electrolysis and salt lake.