采用等温蒸发平衡法研究了四元体系K2B4O7-Na2B4O7-Li2B4O7-H2O 在273 K时的介稳相平衡及平衡液相的密度。研究发现该四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，相图中有一个共饱点E，三条单变度曲线E3E，E2E，E1E；三个平衡固相分别为K2B4O7·4H2O、Na2B4O7·10H2O 和LiBO2·8H2O。并简要讨论了实验结果。

采用等温蒸发法研究了四元体系Li+, Na+//SO4 2-, B4O7 2--H2O 288 K 介稳相平衡及平衡液相物化性质(密度、电导率、折光 率、粘度和pH 值), 测定了该四元体系288 K 条件下介稳平衡溶液溶解度及物化性质。根据实验数据绘制了相应的介稳相图及 物化性质组成图。研究发现：该体系介稳平衡中有复盐Li2SO4·Na2SO4 形成。其介稳相图中有3 个共饱和点，7 条单变量曲线, 平衡固相为：Li2SO4·H2O, Na2SO4, Li2SO4·Na2SO4, Li2B4O7·3H2O, Na2B4O7·10H2O。复盐Li2SO4·Na2SO4 和一水硫酸锂（Li2SO4·H2O）有较小的结晶区, 而Li2B4O7·3H2O 和Na2B4O7·10H2O 有较大的结晶区; 该四元体系介稳平衡条件下未发现Na2SO4·10H2O 的结晶区。

Metastable equilibrium solubilities and properties such as densities, conductivity, pH, refractive index, and viscosity of the solution were determined experimentally. According to the experimental data, the metastable equilibrium phase diagram was plotted. In the phase diagram, there are three invariant points, seven univariant curves, five fields of crystallization: Li2SO4·H2O, K2SO4, Li2B4O7·3H2O, K2B4O7·4H2O, and K2SO4·Li2SO4. The double salt K2SO4·Li2SO4 was found in the quaternary system metastable equilibria. Lithium sulfate (Li2SO4) has the highest concentration and strong salting-out effects on other salts. Also, the relationship diagram between the properties and the ion concentration of solution was constructed. It can be seen from the relationship diagram that the equilibrium solution density values, viscosity values, and refractive index values are increased apparently with the rise of sulfate ion concentration, reaching the maximum values at eutonic point F3. Electrical conductivity values and pH values, however, fall down with the rise of ion concentration on the whole. 2005 Elsevier Ltd. All rights reserved.

采用等温蒸发法研究了四元体系Li＋，Na＋//24SO－，2CO3－-H2O 288K介稳相平衡及平衡液相的密度、电率、 折光率、粘度和pH值，测定了该四元体系288K条件下介稳平衡溶液溶解度及物化性质。根据实验数据绘制了相应的介稳相图。研究发现：该体系介稳平衡中有复盐Na3Li（SO4）2·6H2O 形成。其介稳相图中有3个共饱点。7条单变量曲线，平衡固相为：Li2SO4·H2O，Na2SO4，Na3Li（SO4）2·6H2O，Li2CO3，Na2CO3·10H2O。复盐Na3Li（SO4）2·6H2O和一水硫酸锂（Li2SO4·H2O）的结晶区较小，而Li2CO3 的结晶区最大；该四元体系介稳平衡条件下未发现Na2SO4·10H2O 的结晶区。