Na_3AlF_6-AlF_3-LiF-CaF_2系熔体变温电导率的研究  

ELECTROCONDUCTIBILITY OF Na_3AlF_6-AlF_3-LiF-CaF_2 SYSTEM AT 20℃ ABOVE ITS INITIAL CRYSTALLIZATION TEMPERATURE

作　　者：马秀芳[1] 张世荣[1] 李德祥[2] 李国华[2] 

机构地区：[1]北京有色金属研究总院,北京100088 [2]东北大学,沈阳110006

出　　处：《有色金属》1998年第4期77-81,共5页Nonferrous Metals

基　　金：国家自然科学基金

摘　　要：本文依据三因子二次正交回归设计，在较宽的成分区域内研究铝电解工业常用电解质体系（2．23～3．0）NaF·AlF3－（0～5％）LiF－（0～　　　　　15％）CaF2系熔体的变温电导率．电导率的测定采用平行四电极法，它克服了熔盐高温及氟盐侵蚀性对测定结果的影响．变温电导率（即初晶温度以上20℃时的电导率）的研究使测定结果更具有可比性．更能反应工业生产实际．经分析得到了与恒温性质不同的结论．这是本体系格体等溶变温性质研究工作的一部分，将为铝电解工业选择适宜的电解质成分提供理论依据．The electroconductibility of the common aluminum electrolyte system(2.23 ~ 3.0)NaF. AlF3-(0~ 5%)LiF-(0~15%) CaF2 at the temperature of 20℃ above its initial crystallization temperature (ICT) was studied by three-factor quadratic regression design. This property was measured by parallel four-electrode method, which could overcome the influence of high temperature and corrode of fluorcomplex. The result is more reliable and more close to the industrial production. This is one part of researches on physico-chemical properties at the temperature of 20℃ above ICT Under the same alumina solubility of the system, which will provide reliable theoretic basis for choosing suitable aluminum electrolyte.

关 键 词：铝电解质 电导率 等值图 炼铝 电解 

分 类 号：TF821.032[冶金工程—有色金属冶金]