Influence of Hydrothermal Reaction Temperature and pH on Phase Stability of Hydroxyapatite

The effect of hydrothermal reaction temperature and pH on crystallite size, phase stability, and sintered density of hydroxyapatite (HAp) has been investigated. The crystallite size increased with the increase in temperature but was not significantly affected by pH. The decomposition of HAp into tri...

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Bibliographic Details
Published in:Key engineering materials 2007-01, Vol.330-332, p.147-150
Main Authors: Ryu, In Young, Kim, Dae Joon, Park, Sun Hyo, Han, Jung Suk, Lee, Myung Hyun
Format: Article
Language:English
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Summary:The effect of hydrothermal reaction temperature and pH on crystallite size, phase stability, and sintered density of hydroxyapatite (HAp) has been investigated. The crystallite size increased with the increase in temperature but was not significantly affected by pH. The decomposition of HAp into tricalcium phosphate was observed at 1250°C and the extent of decomposition decreased with increase in pH. The influence of temperature and pH on the crystallite size and the decomposition was related to the decrease in solubility of Ca2+. The phase stability of HAp, prepared hydrothermally, in HAp/zirconia composites was higher than that of commercial HAp due to its high sintered density.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.330-332.147