文献类型：期刊文献

中文题名：磷酸钙骨水泥的水化放热行为

英文题名：EXOTHERMAL BEHAVIOR IN THE HYDRATION PROCESS OF CALCIUM PHOSPHATE CEMENT

作者：刘昌胜[1];刘子胜[1];潘颂华[1]

机构：[1]华东理工大学生物材料研究所,上海200237

年份：2000

卷号：28

期号：6

起止页码：501

中文期刊名：硅酸盐学报

外文期刊名：Journal of The Chinese Ceramic Society

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(59302013);上海市自然科学基金重点项目(95JC14018);国家"863"攻关项目(715-009-0100)的资助

语种：中文

中文关键词：磷酸钙骨水泥;水化;羟基磷灰石;放热

外文关键词：calcium phosphate cement;hydration;hydro_xyapatite;heat liberation

摘要：深入研究了由磷酸四钙 (tetracalciumphosphate ,TECP)和无水磷酸氢钙 (dicalciumphosphateanhydrous ,DCPA)组成的磷酸钙骨水泥 (calciumphosphatecement ,CPC)水化反应过程的放热行为及其影响因素 .CPC的水化反应是放热反应 ,整个反应经历初始期、诱导期、加速反应期、减速反应期及终止期 5个时期 .引入羟基磷灰石(hydroxyapatite ,HAP)晶种可使诱导期缩短 ,反应峰前移 ,且在2 5℃时引入晶种的影响较 37℃时更为明显 ,这是由于晶种的引入降低了异相成核的活化位能的缘故 .提高温度不仅使反应峰前移 ,而且使反应峰明显增大 ,由此计算出反应活化能为 176kJ/mol.原料颗粒大小及钙磷比对水化反应影响很大 ,降低TECP的粒径及样品的钙磷比会使反应速度明显加快 ,且使反应峰大大提前 .由 2 5℃时n(Ca) /n(P)为 1.5和 1.6 7时的水化反应热可以计算出磷酸四钙和缺钙羟基磷灰石 (calcium_deficienthydroxyapatite ,CDHA)的标准摩尔生成焓分别为 -5 90 8kJ/mol和 -11119kJ/mol.
The exothermal behavior of calcium phosphate cement (CPC) in the hydration process and the influencing factors were investigated systematically. The hydration process of CPC can be divided into five periods: starting, inducing, accelerating, decelerating and terminating period. The introduction of hydroxyapatite (HAP) crystal seed shortens the inducing period and makes the reaction peak advanced.The effect of introduction of crystal seed at 25 ℃ is found more remarkable than at 37 ℃ , which may be resulted from the reduced activity energy of heterogeneous nucleation. The activity energy of reaction calculated is 176 kJ/mol. The increase of temperature makes not only the reaction peak advanced but also enlarged. The particle size of the feed and the ratio of calcium to phosphate in the sample have a significant effect on the hydration. The decrease of particle diameter of tetracalcium phosphate (TECP) and also the ratio of calcium to phosphate result in a marked acceleration of reaction and make the reaction peak advanced evidently. However, the effect of particle diameter of dicalcium phosphate anhydrous (DCPA) on the hydration is not so remarkable. According to the heat liberation in the hydration of CPC samples with Ca, P mole ratio of 1.5 and 1.67, the calculated standard mole enthalpy of the formation of TECP and calcium-deficient hydroxyapatite (CDHA) is -5 908 kJ/mol and -11 119 kJ/mol , respectively.