溶胶–凝胶法制备纳米羟基磷灰石粉体

以四水合硝酸钙和五氧化二磷为原料，无水乙醇为溶剂，采用溶胶一凝胶法制备了含co}的羟基磷灰石（hydroxy印atite，HAP）粉体。采用热重-差热分析、X射线衍射、透射电子显微镜、Fourier变换红外光谱等研究了反应体系pH值、反应温度及前驱体热处理温度等因素对产物结构与性能的影响规律，结果表明：采用溶胶-凝胶工艺，调控反应体系的pH、反应温度及前驱体的热处理温度是获得纯度高、分散性较好的纳米HAP粉体的关键。pH值为8．0、反应温度为30℃，经600℃热处理可获得到粒径为40~50nm的HAP纳米粉体。

Synthesis of Nano-Sized Hydroxyapatite by Powder Sol-Gels Method

The nano-sized hydroxyapatite (HAP) powder was synthesized with Ca(NO 3 ) 2 ·4H 2 O and P 2 O 5 by a sol–gels process. The effects of pH value of solvent, reaction temperature and heated temperature on the crystallinity and morphology of nano-sized HAP were investigated by thermogravimetric/differential thermal analyzer, X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy, respectively. The nano-particles of HAP with a higher crystallinity and a good disparity could be controlled via the adjustment of the process parameters such as reaction temperature, pH value of solution and heat treatment temperature. The results show that the nano-particles of HAP containing CO32– with the good crystallinity and the particle sizes of 40–50 nm could be obtained at the reaction temperature of 30 ℃, the pH value of 8 and the heat treatment temperature of 600 ℃.