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J. Korean Ceram. Soc. > Volume 27(7); 1990 > Article
Journal of the Korean Ceramic Society 1990;27(7): 907.
습식 합성 Hydroxyapatite의 가열 분해성
김창은, 박훈, 김배연1, 이동윤
연세대학교 요업공학과
1인천대학교 재료공학과
The Thermal Changes of Precipitated Hydroxyapatite
ABSTRACT
The hydroxyapatite powder was prepared by the precipitation method. The obtained powder was heat-treated and its products were investigated in order to characterize its decomposition process. The powder was Ca-deficient hydroxyapatite with no relation to the Ca/P mole ratio in the initial solution. The obtained hydroxyapatite was thermally decomposed into tricalcium phosphate [Ca3(PO4)2, TCP] after heat-treatment above 80$0^{circ}C$ and the extent of the decomposition was dependent on the nonstoichiometry of obtained hydroxyapatite, and the resultant hydroxyapatite and tricalcium phosphate maintained stable forms up to 120$0^{circ}C$. The hydroxyapatite powder had the better stability with the samller the nonstoichinometry of hydroxyapatite. And the quantities of tricalcium phosphate obtained after decomposition were decreased, and also the corresponding decomposition temperatures were increased with decreasing extent of nonstoichiometry in precipitated hydroxyapatite.
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