Calcium phosphate apatites with variable Ca/P atomic ratio I. Synthesis, characterisation and thermal stability of powders
Calcium phosphate apatites with variable Ca/P atomic ratio I. Synthesis, characterisation and thermal stability of powders
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DOI：
10.1016/s0142-9612(01)00218-6
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发表时间：
2002-02-01
期刊：
影响因子：
14
通讯作者：
Thomas, P
中科院分区：
文献类型：
--
作者：
Raynaud, S;Champion, E;Thomas, P
采用湿法合成了Ca/P摩尔比为1.5 ~ 1.667（0 ≤ tox ≤ 1）的单相磷灰石磷酸钙粉体Ca_（10-x）（PO_4）（6-x）（HPO_4）（x）（OH）（2-x）。在该组成范围之外，粉末是由磷酸钙磷灰石和CaHPO 4（Ca/P < 1.5）或Ca（OH）（2）（Ca/P > 1.667）组成的两相混合物。合成温度和pH值是控制沉淀物组成的优势参数。化学成分的精确测定需要使用几种补充技术和粉末的热处理。这些技术包括高分辨率和高温X射线衍射和FTIR光谱，并表明，非常小的变化的Ca/P的摩尔比的粉末导致的粉末组成和特性的热处理后的巨大变化。(C)2001爱思唯尔科技有限公司版权所有。
Single phased apatitic calcium phosphate powders Ca10-x(PO4)(6-x)(HPO4)(x)(OH)(2-x) with Ca/P molar ratio ranging from 1.5 to 1.667 (0 less than or equal tox less than or equal to1) were synthesised using wet method. Outside this compositional range the powders were biphasic mixtures composed of a calcium phosphate apatite and CaHPO4 (Ca/P < 1.5) or Ca(OH)(2) (Ca/P > 1.667). Temperature and pH of synthesis were the preponderant parameters for the control of the precipitate composition. The precise determination of the chemical composition requires the use of several complementary techniques and thermal treatments of powders. These techniques include high resolution and high temperature X-ray diffractometry and FTIR spectroscopy and show that very small variations of the Ca/P molar ratio of the powder lead to great changes in powder composition and characteristics after thermal treatment. (C) 2001 Elsevier Science Ltd. All rights reserved.