Thermodynamics of the Ca-CaO-CaF2 system
Thermodynamics of the Ca-CaO-CaF2 system
复制标题
Ca-CaO-CaF2 体系的热力学
DOI：
10.1007/s11663-001-0053-3
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
B. M. Mogutnov
中科院分区：
文献类型：
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作者：
A. Zaitsev;B. M. Mogutnov
用静态法测定了1165 ~ 1812 K温度范围内Ca-CaO、Ca-CaF 2和Ca-CaO-CaF 2三种溶液中钙的蒸气分压。同时测定了固体CaO或CaF 2在熔体中的溶解度。所有解的特征在于与拉乌尔定律的正偏差。Ca-CaF 2熔体的热力学性质近似的亚正规溶液模型的理想熵项和Ca-CaO的模型，考虑到一些有序的分子排列。三元液体溶液的热力学描述是在这样的假设下得到的：从二元组分系统到三元组分系统，粒子间的相互作用没有改变，并且没有三元相互作用。该模型被应用于所研究的系统的相图的计算。
A static method was used to measure the partial vapor pressure of calcium over the Ca-CaO, Ca-CaF2, and Ca-CaO-CaF2liquid solutions in the temperature range from 1165 to 1812 K. Simultaneously, the solubility of solid CaO or CaF2in the melts was determined. All solutions are characterized by positive deviations from Raoult’s law. The thermodynamic properties of the Ca-CaF2melt were approximated by a subregular-solutions model with the ideal entropy term and those of Ca-CaO by a model that takes into account some ordering in molecular arrangement. The thermodynamic description of the ternary liquid solution was attained under the assumptions that interparticle interactions do not change in going from the binary constituent systems to the ternary one and that there is no triple interaction. The models were applied for the computation of phase diagrams of the studied systems.