冲击波活化羟基磷灰石粉末的烧结动力学研究

对水溶液沉淀法合成的羟基磷灰石(HA)粉末团聚体经冲击波处理后的烧结动力学进行了分析，根据烧结过程中的线收缩率随温度的变化，估算出了烧结的活化能，并与未经冲击波处理的HA粉末比较。研究结果表明：经冲击波处理后，HA粉末的烧结性能得到了改善，未经冲击波处理的HA粉末的烧结活化能为106.5 kJ/mol，而经过冲击波处理后烧结活化能降为63.2 kJ/mol。冲击波处理是一种提高HA粉末烧结特性的有效的方法，这有利于扩大HA陶瓷的应用范围。

Sintering Dynamics of Shock-activating Hydroxyapatite Powders

The sintering dynamics of Hydroxyapatite(HA)agglomerate powders which are synthesized by deposition method and then treated under the shock wave has been analyzed.The sintering characteristics and the sintering action energy of being shocked and unshocked HA are studied respectively according to the change of linear shrink rate during the course of sintering.The results of study show that the sintering action energy of being shocked and unshocked HA are estimated to be 63.2 kJ/mol and 106.5 kJ/mol respectively.The sintering characteristics of HA powders have been improved after treated by shock wave and the strength of HA ceramics made of the shocked sample can be obviously enhanced.The treatment with shock wave is an effective method to improve the sintering of HA agglomerate powders,which can widen the application field of HA in biomedical engineering.