以Ca(NO3)2·4H2O和(NH4)2HPO4为前驱物,采用微波法快速制备出由30nm左右的小颗粒自组装成短捧状的纳米羟基磷灰石粉末,并分析了其自组装的原因。采用XRD,IR,TG-DTA,TEM对其进行了测试,并探讨了不同的微波辐射时间、微波功率、低温煅烧对羟基磷灰石粉体的热稳定性的影响。研究结果证实:随微波辐射反应溶液时间的延长,HAP的热稳定性提高,微波辐射反应溶液的最佳时间是1h;随微波功率的升高,HAP的热稳定性提高;微波辐射反应溶液时间为1h、微波功率为700W、500℃保温HAP3h,HAP在1200℃稳定存在。
Nanosized hydroxyapatite powders were prepared by a microwave process using Ca(NO3)2·H2O and(NH4)2HPO4 as starting materials.
The powder is composed of rod-shaped particle that is about 30nm in width and 80～200nm in length. The synthesized powders were measured by X-ray
diffraction, transmission electron, infrared spectroscopy and thermogravimetric analysis. Various parameters such as time and power of microwave irradiation
have significant effects on thermal stability of hydroxyapatite. The results show that the decomposition temperatures of HAP increase with
time prolonging and power increasing of microwave irradiation. When the time and power of microwave irradiation are 1h and 700W, and the sample treated
at 500℃ for 3h, HAP is still stable at 1200℃.
参考文献
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