碳酸根含量对碳酸羟基磷灰石形貌和热处理的影响分析

采用沉淀法制备了两种不同碳酸根〈CO3^2-）含量的纳米碳酸羟基磷灰石（nanosized carbonated hydroxyapatite，CHA），研究了碳酸根含量对CHA晶体形貌、烧结和热稳定性的影响，用X射线衍射和透射电镜表征了样品的物相组成与形貌．结果表明：随着碳酸根含量的减小，CHA晶粒尺寸和长径比增加；CHA坯体的烧结温度和粉体的热稳定性与初始的碳酸根含量有关，含量越高，烧结温度越低，热稳定性越差．

EFFECT OF CARBONATE CONTENTS ON THE MORPHOLOGY AND HEAT TREATMENT OF CARBONATED HYDROXYAPATITE

Nanosized carbonate hydroxyapatites （CHA） with two different levels of carbonate have been synthesized by an aqueous precipitation method. The effects of the carbonate con- tents on the morphology, sintering and thermal stability of CHA were investigated. The phase composition and morphology of the CHA powders were characterized by X-ray diffraction and transmission electron microscope, respectively. The results show that the size and aspect ratio of the CHA crystals increase as the carbonate contents decrease. The sintering temperature of powder compacts and thermal decomposition temperature of powder decrease as the initial carbonate contents increase.