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采用等温溶解平衡法研究了三元体系Na2 B4O7—K2 B4O7—H2 O 2 88K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 :K2 B4O7·4H2 O ,Na2 B4O7·10H2 O ;实验结果表明 :K2 B4O7对Na2 B4O7有增溶作用 ,并简要讨论了物化性质的变化规律
The phase equilibrium of the ternary system Na2B4O7-K2B4O7-H2O2 88K and the main physicochemical properties (density, conductivity, pH) of the equilibrium liquid phase were studied by isothermal dissolution equilibrium method. The results show that the ternary system is simple and saturated, without salt and solid solution. According to the solubility data, the phase diagram is plotted. The equilibrium solid phases corresponding to the univariate curves in the phase diagram are K2B4O7.4H2O, Na2 B4O7 · 10H2O. The experimental results show that K2B4O7 has a solubilizing effect on Na2B4O7, and the variation of physicochemical properties is briefly discussed