【摘要】 以Ca(NO3)2.4H2O和(NH4)2HPO4为原料,采用化学沉淀法,在超声波和机械双重搅拌下,常压合成了羟基磷灰石(简称HA)。对热处理前后的产物进行了X射线衍射(XRD)和透射电镜(TEM)分析。结果表明:热处理能显著提高HA粉体的结晶度;热处理前的HA粉体晶粒尺寸较小,热处理后HA晶粒长大。采用超声波和机械双重搅拌获得的HA粉体的结晶度比采用单纯机械搅拌获得的HA粉体的结晶度高。而且,采用双重搅拌获得的HA粉体晶粒大小比较均匀,形状趋于球形,且团聚粘联现象减少,分散性好。更多还原

【Abstract】 Hydroxyapatite（HA） was prepared by chemical precipitation method under atmospheric pressure with double stirring（ultrasonic and mechanical）and by using Ca（NO₃）₂·4H₂O and（NH₄）₂HPO₄ as reactant.The precipitated products were analyzed by X-ray diffraction（XRD） and transmition election microscopy（TEM）.The results indicate that the crystallinity of HA powders can be improved by heat-treatment.The dimensions of HA grains before heat treatment are smaller than that of ones heat-treated.Under the condition of double stirring,crystallinity of HA grains is higher and the shape of it is equiaxial.Furthermore, the HA powders are dispersed perfectly.更多还原