室温固相法制备羟基磷灰石粉体

Preparation of Hydroxyapatite Powders by Solid-state Reaction at Room Temperature

以磷酸氢二铵、硝酸钙为原料,采用室温固相反应通过850℃热处理制备了羟基磷灰石(HAP)粉末。并应用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)和热重差热分析(TG-DTA)等手段对合成羟基磷灰石的物相组成、化学组成、微观形貌、热稳定性进行了表征和分析。结果表明合成的羟基磷灰石形貌规整、分散均匀、热稳定性好,热处理有效控制了粉体的团聚,显著提高了羟基磷灰石晶粒的结晶度。

Hydroxyapatite（HAP） powders were prepared by the solid-state reaction at room temperature via heat treatment in 850 ℃,using Ca（NO3）2·4H2O and（NH4）2HPO4 as raw materials.The phase composition,chemical composition,micromorphology and thermal stability of the obtained HAP powders were characterized by XRD,SEM,FT-IR and TG-DTA.The results indicated that the synthesized HAP had good uniformity,dispersity and thermal stability.The heat treatment could solve the reunion problem to a certain extent and improve the crystallinity of HAP grains.