TiO2对CaO-MgO-P2O5-SiO2系玻璃晶化影响的研究

CaO-MgO-P2O5-SiO2系微晶玻璃是一种新型医学生物材料，该材料洋仅具有良好的生物相溶性，还具有一定的力学性能，本文采用热热分析（DTA）方法对以TiO2作为晶核剂的该系生物微晶玻璃的析晶动力学参数进行了测定，所得数据经计算机拟合后，其结果表明，在一定范围内引入TiO2（≤8.7wt%)能降低该系玻璃的析晶活化能E，有促进玻璃析晶的作用，当TiO2含量达到8.7wt%时，E达到最小值，当TiO2含量＞8.7wt%时，E值反而回升，晶化指数n与该玻璃体系中加入TiO2的变化规律与E值随TiO2的变化规律是一致的。

Studies on the Crystallization Dynamics of Ca-P-Si Glass-Ceramic

CaO-MgO-P2O5-SiO2 glass-ceramic is a new medicinal biologic material. It not only has good biocompatibility but also improves mechanical properties. The kinetic parameters of this glass-ceramic were calculated by differential thermal analysis (DTA) and the JMA equation. The results indicate that the content of TiO2 effects on the crystallization activation energy (E) and the crystal growth index (n). E increases with the increasing of TiO2 content. And E reaches a max value when TiO2 content is about 8.7%. When TiO2 content increases further (>8.7%), E decreases inversely. The rule of n vs TiO2 content is consistent with that of E vs TiO2 content.