中文摘要：

采用化学沉淀法在Ca（OH）2／H3PO4／H2O体系下合成了纳米羟基磷灰石（HA）粉体，研究了影响纳米羟基磷灰石生成的重要参数——反应温度对粒度和相结构的影响，用FT-IR、XRD、TEM等对HA的粒度、相结构和形貌进行了表征。结果表明，反应温度不仅影响纳米卧粉体的粒度、结晶度，而且影响纳米结晶的生长习性。在25％。90℃范围内合成了纳米HA粉体，随反应温度的提高，纳米羟基磷灰石颗粒的结晶尺寸呈先增加后减小的趋势，形状由针状变为短棒状。

英文摘要：

Nanocrystal hydroxyapatite were prepared by a wet chemical precipitation method. The effects of different reaction temperatures on the phase composition, crystallinity, particle shape and particle size were studied with FT-IR spectroscopy, X-ray diffraction（XRD）, transmission electron microseopy（TEM）, and electron diffraction（ED）. The results showed that phase composition, particle size and morphology were sensitive to reaction temperatures. Nanocrystals hydroxyapatite synthesized at low temperatures（25 ℃ - 60℃ ） were needle-like, and became circular at higher temperature（90℃ ）.