Na_3AlF_6-AlF_3-LiF-CaF_2系熔体变温密度的研究  

DENSITY OF Na_3AlF_6-LiF-CaF_2 SYSTEM AT 20 ℃ ABOVE INITIAL CRYSTALLIZATION TEMPERATURE

作　　者：马秀芳[1] 张世荣[1] 李德祥[2] 陈建设[2] 谭德康 李国华[2] 

机构地区：[1]北京有色金属研究总院,北京00088 [2]东北大学,沈阳110006

出　　处：《有色金属》1999年第1期61-64,共4页Nonferrous Metals

基　　金：国家自然科学基金

摘　　要：本文区别于以往的恒温性质，在较宽的成分区域内研究（2．23～3．0）NaF·AlF3－（0～5％）LiF－（0～15％）CaF2系熔体的变温密度，测定结果用三因子二次正交回归数学模型描述。与1000℃恒温性质相比，各因子对变温密度的影响规律出现新特点，它更贴近工业生产实际。本文还绘制一定分子比下的变温密度等值图。此工作为进一步研究本体系等溶变温性质奠定基础，为铝电解工业选择适宜的电解质成分提供理论依据。Density of (2,23~3.0) NaF·AlF3-(0~ 5%)LiF-(0~15%) CaF2 system was studied within a broad range of composition at the temperature of 20℃ above nibal crystallization temperature(ICT), which differed from the isothermal properties obtained before. The result was described by a three-factor quadratic regression equation. As compared to the properties at 1000℃, effect of all factors on the density are mere close to the industrial production, and show new charaCteristics. Density isograms were also given in this paper. The research laid the foundation for physico-chemical properties under the same alumina solubility at 20℃above ICT, and provided reliable theoretic basis for choosing suitable aluminium electrolyte of the system.

关 键 词：铝电解质 密度 等值图 熔体 变温密度 

分 类 号：TF821.032[冶金工程—有色金属冶金] TF821.013