三元体系Na_2B_4O_7-NaBr-H_2 O 298K相平衡研究  

Study on the Phase Equilibrium of Na_2B_4O_7-NaBr-H_2 O Ternary System at 298K

作　　者：桑世华[1] 虞海燕[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059

出　　处：《海湖盐与化工》2006年第2期4-5,8,共3页Sea-Lake Salt and Chemical Industry

基　　金：四川教育厅自然科学基金资助项目(2004C020)

摘　　要：采用等温溶解平衡法研究了三元体系Na2B4O7-NaB r-H2O 298K时的相平衡及平衡液相的主要物化性质(密度,电导率,pH)。研究发现:该三元体系为简单共饱和型,无复盐及固溶体形成。根据溶解度数据绘制了相图,相图中单变量曲线所对应的平衡固相分别为:Na2B4O7.10H2O,NaB r.2H2O;并简要讨论了物化性质的变化规律。In this paper, Phase equilibrium physical -chemical properties （density, electrical conductivity and pH） of solution were studied in the ternary system Na2B4O7 - NaBr - H2O at 298K by the isothermal solution equilibrium method. The results show that the ternary system is a type of simple common saturation and without complex salt and solid solution. Based on the solubility data, the phase diagram of the ternary system was plotted, which consists of two univariant curves. The phase equilibrium solids of counterpart were Na2B4O7 · 10H2O, NaBr ·2H2O. The laws of physical and chemical propery in the solution were discussed simply.

关 键 词：水盐体系 相平衡 硼酸钠 澳化钠 

分 类 号：O642.4[理学—物理化学]