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溶解度曲线图对湿法合成氟取代羟基磷灰石有很重要的指导意义,但是这方面的数据资料很少,本文将描述Ca~(2+)- PO_4~(3-)-OH~--F~--CO_3~(2-)-H_2O体系平衡关系的强非线性方程组求解转变成最优化问题,用广义简约梯度(GRG)增强的遗传算法求解该体系的平衡关系,获得含氟磷灰石-水体系的溶解度相图。结果显示在pH=9附近处,磷灰石溶解度最小,Ca/P和Ca/F增加,磷灰石的溶解度随之增加,温度升高,磷灰石溶解度降低。
Solubility curve is very important for the synthesis of fluorine - substituted hydroxyapatite by wet method. However, there is little data in this area. This paper will describe the effect of Ca ~ (2 +) - PO_4 ~ (3 -) - F = - CO_3 ~ (2 -) - H_2O system is transformed into an optimization problem, and the equilibrium relationship of the system is solved by the genetic algorithm enhanced by Generalized Reduced Gradient (GRG) Solubility phase diagram of a graystone-water system. The results showed that the solubility of apatite was the smallest, the content of Ca / P and Ca / F was increased at pH = 9, the solubility of apatite increased with the increase of temperature, and the solubility of apatite decreased.