Termal decomposition of carbonated calcium phosphate apatites

被引:0
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作者
J. P. Lafon
E. Champion
D. Bernache-Assollant
R. Gibert
A. M. Danna
机构
[1] Science des Procédés Céramiques et de Traitements de Surface UMR 6638,Faculté des Sciences et Techniques
[2] Ecole Nationale Supérieure des Mines,Centre SPIN, PC2M
关键词
bioceramics; thermal stability; carbonate apatites;
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学科分类号
摘要
The thermal stability of AB-type carbonated calcium phosphate apatites prepared by precipitation from aqueous media was studied. The behavior of powders was investigated using temperature programmed XRD, infrared spectroscopy and thermogravimetry. In N2 atmosphere, two successive peaks of decarbonatation with maxima at about 700 and 950°C occurred. This behavior is explained by different substitution modes for carbonates in the apatite. The decarbonatation peaks were shifted to higher temperature under CO2 (around 900 and 1150°C). The analysis of the thermal stability allowed further densification of carbonate apatite ceramics without important carbonate loss.
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页码:1127 / 1134
页数:7
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