Equivalent conductivity and its activation energy of NaF-AlF_3 melts  

作　　者：胡宪伟 王兆文 高炳亮 石忠宁 阚洪敏 罗旭东 陶文举 

机构地区：[1]The Key Laboratory of Ministry of Education for Electromagnetic Processing of Materials, Northeastern University

出　　处：《中国有色金属学会会刊：英文版》2009年第3期719-723,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50334030) supported by the National Natural Science Foundation of China;Project(2007CB210305) supported by National Basic Research Program of China

摘　　要：Electrical conductivity of NaF-AlF3 melts was measured by continuously varying cell constant(CVCC) technique. Relationships between equivalent conductivity at 990-1 030 ℃ and temperature and composition, and relationship between equivalent conductivity activation energy and composition of the melts were then studied on the basis of two-step decomposition mechanism of AlF63-. According to the changes of molar fractions of different anions in NaF-AlF3 melts, courses of dependence of equivalent conductivity and its activation energy on composition were analyzed. The results show that the influence of temperature on equivalent conductivity of the melts is small in the researched temperature range, and equivalent conductivity increases with increasing the molar fraction of AlF3; there is a minimum point in the activation energy—composition curve when molar fraction of AlF3 is 0.29.Electrical conductivity of NaF-AlF3 melts was measured by continuously varying cell constant（CVCC） technique. Relationships between equivalent conductivity at 990-1 030 ℃ and temperature and composition, and relationship between equivalent conductivity activation energy and composition of the melts were then studied on the basis of two-step decomposition mechanism of AlF6^3-. According to the changes of molar fractions of different anions in NaF-AlF3 melts, courses of dependence of equivalent conductivity and its activation energy on composition were analyzed. The results show that the influence of temperature on equivalent conductivity of the melts is small in the researched temperature range, and equivalent conductivity increases with increasing the molar fraction of AlF3; there is a minimum point in the activation energy--composition curve when molar fraction of AlF3 is 0.29.

关 键 词：导电活化能 ALF3 电导率 氟化钠 融化 等效 摩尔分数 温度范围 

分 类 号：O611.3[理学—无机化学]