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.
