Hydroxyapatite( HA) was prepared by the hydrothermal method and template method of using PEG-400、Ca( NO_3)_2·4H_2O、( NH_4)_2HPO_4、ammonia water、and KH_2PO_4 as raw materials. FT-IR,TG,SEM and XRD were used to characterize the morphology and composition of the product. Influence of the synthetic method for crystal shape and particle size were studied. Then dispersibility of HA was studied by ultrasonic dispersion and static settlement. The results show that the HA by template method has more uniform size dis...