文献类型：期刊文献

中文题名：磷酸钙骨水泥的水化反应机理研究

英文题名：Mechanisms of Hydration of Calcium Phosphate Cement

作者：沈卫[1];刘昌胜[1];顾燕芳[1];胡黎明[1]

机构：[1]华东理工大学技术化学物理研究所

年份：1996

卷号：11

期号：4

起止页码：685

中文期刊名：无机材料学报

外文期刊名：Journal of Inorganic Materials

收录：CSTPCD;;EI(收录号：1997123972947);Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金;上海市科技启明星资助

语种：中文

中文关键词：磷酸钙骨水泥;水化反应;陶瓷;人工骨材料;医疗用

外文关键词：calcium phosphatc cement, hydration, solubility, controlled by surface dissolution, controlled by diffusion

摘要：本文对新型的人工骨材料磷酸钙骨水泥（简称ＣＰＣ）的水化反应机理进行了研究．结果表明，ＣＰＣ水化反应的热力学基础在于各种磷酸钙盐溶解度的差异，当ｐＨ＞４．２时，羟基磷灰石ＨＡＰ的溶解度最小．其它磷酸钙盐在水中可通过溶解沉淀析出ＨＡＰ；ＣＰＣ采用两种酸碱性不同的磷酸钙盐，可以利用酸碱副产物的中和反应使体系ｐＨ值稳定，使水化反应保持一定的推动力，由磷酸四钙ＴＥＣＰ和无水磷酸氢钙ＤＣＰＡ组成的ＣＰＣ；其水化反应的动力学前期由ＤＣＰＡ的表面溶解控制，后期由通过产物层的扩散控制．
Calcium Phosphate Cement (CPC) is a new kind of bone repair material. The mechanism of hydration of CPC was studied and some results were obtained. The hydration of CPC is based on the differences of solubility of calcium phosphate salts. HAP is the least soluble phase when pH>4.2, so other calcium phosphate salts can dissolve and reprecipitate as HAP when suspended in an aquenous solution; when CPC is comprised of two kinds of calcium phosphate salts with different basicity or acidity, the pH value of the system will become stable by the neutralizing reaction of acidic and basic byproducts, so the promotion of hydration is inaintained and the reacion can proceed to completion. The binetics of hydration of CPC which consists of tetracalcium phosphate (TECP) and dicalcium phosphate anhydrous (DCPA) is initially controlled by the surface dissolution of DCPA, and cvcntually controlled by the rate of diffusion through the product layers.