熔融CaCl2-MgCl2体系的粘度

用旋转柱体法系统测量了CaCl2-MgCl2熔融盐体系的粘度,考察了熔融CaCl2-MgCl2体系粘度随温度和组成的变化关系.比较了实验测得的数据与文献报道值,根据熔融盐体系粘度变化规律对熔融体系结构进行了推断.实验测得熔融物体系粘度随温度升高而明显降低,由于所用试剂含有少量杂质,与文献报道的纯CaCl2和MgCl2的粘度值相比,实验测得值出现偏差.熔融CaCl2-MgCl2混和体系的粘度明显要比纯物质的粘度大,这说明在熔融条件下,CaCl2-MgCl2体系生成了体积较大的配合物粒子,增加了熔体粘度.在不同的温度条件下,由于有不同组成的配合物生成,体系粘度最大值对应了不同熔体组分.

Viscosity properties of molten CaCl2-MgCl2 system

The viscosities of molten CaCl_2-MgCl_2 system were measured using rotating cylinder method, and the variations with temperature and components were explored. The experimental data were compared with the literatural ones, the deduction and prediction to the structure of molten CaCl_2-MgCl_2 proceeded on the base of variating regulations of molten melts with temperature and components as well. The viscosities of molten chlorides were decreasing apparently with increasing temperature, however, because of the impurity in experimental reagents, there were discriminations between literatural and experimental values. As larger volume complex ions being formed, the viscosities of molten mixing CaCl_2-MgCl_2 melts were higher than those of the pure components. And different complex ions were formed at different temperatures, the highest points of viscosity in the system are corresponding with different compositions.