Hydration Properties of <TEX>$alpha$</TEX>-Tricalcium Phosphate in Tris. Solution

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J. Korean Ceram. Soc. > Volume 30(11); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(11): 905.

$alpha$-Tricalcium Phosphate의 Tris. Solution에서의 수화특성

인경필, 최상흘

한양대학교 무기재료공학과

Hydration Properties of $alpha$-Tricalcium Phosphate in Tris. Solution

ABSTRACT

$alpha$-tricalcium phosphate($alpha$-TCP) powders were synthesized and their hydration properties were investigated in Tris. solution. Two kinds of $alpha$-TCP powder samples were prepared; the one is reaction product of CaHPO4.2H2O and CaCO3, and another is that of hydroxyapatite(HAp) and $beta$-Ca2P2O7. They were satisfied with Ca/P mole ratio 1.5 and were heated at 150$0^{circ}C$ for 5 hours. In the hydration of $alpha$-TCP samples the powder which was synthesized from HAp and $beta$-Ca2P2O7 was hydrated faster than that from CaHPO4.2H2O and CaCO3. The hydration reaction of $alpha$-TCP powder transformed rapidly into HAp accompanying setting and hardening. It was realized that the hydration reaction of $alpha$-TCP was due to the solution-precipitation mechanism and the hydrates from the reaction were Ca-deficient HAp having funtional group HPO42-.