Influence of temperature, ripening time and calcination on the morphology and crystallinity of hydroxyapatite nanoparticles
Influence of temperature, ripening time and calcination on the morphology and crystallinity of hydroxyapatite nanoparticles
复制标题
DOI：
10.1016/s0955-2219(02)00413-2
复制
发表时间：
2003-09-01
影响因子：
5.7
通讯作者：
Bao, X
中科院分区：
文献类型：
--
作者：
Pang, YX;Bao, X
以氯化钙和磷酸氢铵为原料，采用化学沉淀法制备了纳米羟基磷灰石（HA）颗粒。研究了温度、熟化时间和煅烧对HA纳米粒子结晶度和形貌的影响。结果表明，随着合成温度的升高和熟化时间的延长，其结晶度和晶粒尺寸增大。XRD和TEM结果表明，HA纳米粒子的形貌变化与其结晶度有关。HA的高结晶度使得纳米粒子的形状规则，表面光滑。在650 ℃下煅烧6 h后，HA粉末的结晶度大大增加，但煅烧后晶粒尺寸的变化取决于“原样”HA纳米颗粒的结晶度和晶粒尺寸。(C)2003爱思唯尔科技有限公司版权所有。
Nano-sized hydroxyapatite (HA) particles were prepared by chemical precipitation through aqueous solutions of calcium chloride and ammonium hydrogenphosphate. The influence of temperature, ripening time and calcination on the crystallinity and morphology of the HA nanoparticles were investigated. It was found that the crystallinity and crystallite size increased with the increase of synthetic temperature and ripening time. XRD and TEM results showed that the morphology change of HA nanoparticles was related to their crystallinity. High crystallinity of HA led to regular shape and smooth surface of the nanoparticles. The crystallinity of HA powders increased greatly after calcination at 650 degreesC for 6 h but the change of the crystallite size after calcination was dependent on the crystallinity and crystallite size of "as prepared" HA nanoparticles. (C) 2003 Elsevier Science Ltd. All rights reserved.