偏硼酸钠介稳区性质的研究

Study on the Properties of Metastable Zone for Sodium Metaborate

本文采用等温溶解法测定了偏硼酸钠在不同温度下的溶解度,并采用激光透射装置,完成了偏硼酸钠盐在不同温度下的介稳区宽度研究。实验结果表明:随着搅拌速度的增大,偏硼酸钠盐的介稳区宽度变窄,随着降温速度的增大,偏硼酸钠介稳区宽度变宽。根据不同降温速率的硼酸钠介稳区数据拟合了成核速率方程,得到了表观二次成核级数m,并分析了杂质离子含量对介稳区性质的影响行为。

In this paper, the solubility of sodium metaborate at different temperatures was measured by isothermal dissolution method, and the metastable zone width of sodium metaborate was studied with laser transmission device. The experimental results show that the metastable zone width decreases with the increase of stirring speed, and the metastable zone width of sodium metaborate increases with the increase of cooling speed. According to the data of sodium borate metastable zone with different cooling rates, the nucleation rate equation was fitted, and the apparent secondary nucleation order m was obtained, and the influence of different impurity ion content on the properties of metastable zone was analyzed.