超声波合成技术在纳米羟基磷灰石制备中的应用

Synthesis of Hydroxyapatite Nanoparticles in Ultrasonic Precipitation

采用超声波合成技术,以硝酸钙和磷酸氢二铵为原料,在恒温、常压下,通过控制合成过程中的超声时间、超声功率,成功合成了粒子尺寸为20nm×50nm、粒度分布窄、分散性好的针状晶体纳米羟基磷灰石.利用扫描电镜(SEM)和X衍射(XRD)来表征粒子的表面形貌和相组成,透射电镜来表征粒子尺寸.讨论了不同合成条件对纳米羟基磷灰石晶体的形态、尺寸及其分散性的影响.结果表明,最佳超声功率为80W、超声时间为1.5h合成出的纳米羟基磷灰石粉末的分散性最好.

Nanocrystalline hydroxyapatite （HAp） was prepared by a synthetical method with the aid of ultrasonic mixing using Ca（NO3 ）2 and NH4H2PO4 as raw material. The crystallization and morphology of the prepared nanoparticles were characterized by X - ray diffraction （XRD） and scanning electron microscopy （SEM）. The size of the na- nohydroxyapatite was measured by TEM. The influence of the ultrasonic power and time on the HAp formation rate was also investigated. The results indicate that the best power and time combination is 80W and 1.5h respectively.