天然羟基磷灰石生物陶瓷的制备及性能表征

PREPARATION AND CHARACTERIZATION OF HYDROXYAPATITE BIOCERAMICS

用兽骨经过焚烧得到天然羟基磷灰石,采用超细粉碎法制备了亚微米羟基磷灰石粉体,进行了制备工艺的优化,同时结合SEM,XRD等分析测试手段对获得的粉体进行了组分、颗粒尺度分布和微观形态分析。采用固相烧结技术制备天然羟基磷灰石生物陶瓷,确定了烧结工艺参数,即烧结温度在1250℃,成型剂的最佳添加量为6%,烧结时间4h。测得其陶瓷样品的烧失率为3.19%,密度为3.04g·cm-3。利用X-射线衍射和扫描电子显微电镜(SEM)对生物陶瓷样品的晶相组成和形貌进行了表征。

Submicron HAP powder was prepared by the ultrafine grinding of natural hydroxyapatite from burnt animal bones. The preparation process was optimized and the composition, grain size distribution and microstructure of HAP powder were analyzed by SEM and XRD. Then HAP bioceramics was fabricated by solid state sintering. Its sintering parameters were determined as follows： the sintering temperature was 1250℃, the optimal doping amount of the forming agent was 6%, and the sintering time was 4h. The ignition loss was 3.19% and its density was 3.04g.cm-3. Phase compositions and morphologies of bioceramic samples were characterized by XRD and SEM.