Na_2CO_3-Na_2B_4O_7-H_2O三元体系273K相平衡实验研究  

Experimental Study on the Phase Equilibrium of the Ternary System Na_2CO_3-Na_2B_4O_7-H_2O at 273K

作　　者：周梅[1] 曾英[1] 马旻锐[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：《盐业与化工》2008年第6期24-26,共3页Jounral of Salt and Chemical Industry

基　　金：国家自然科学基金(40673050)

摘　　要：采用等温蒸发法研究了Na2CO3-Na2B4O7-H2O三元体系在273 K时的相平衡以及平衡液相的密度。利用溶解度数据绘制了该三元体系273K下的相图。研究发现,该体系属于简单共饱型,无复盐及固溶体形成,Na2CO3和Na2B4O7互有增溶作用。相图中单变量曲线所对应的平衡固相分别为Na2CO3.10H2O和Na2B4O7.10H2O。The solubilities and densities of equihbrium solutions were studied in the ternary system Na2CO3 - NaEB4O7 - H2O at 273K by isothermal evaporation method. The results show that the ternary system is a type of simple common saturation. No double salt or solid solution was formed. Na2CO3 has salting - in effect on Na2B4O7. Based on the solubility data, the phase diagram of the ternary system was plotted, which consists of two univariant curves. The phase equilibrium solids were Na2CO3 · 10H2O and Na2B4O7 · 10H2O.

关 键 词：水盐体系 相平衡 三元体系 

分 类 号：O658.6[理学—分析化学]