Preparation and Characteristics of Hydroxyapatite Power by Wet Method

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J. Korean Ceram. Soc. > Volume 28(1); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(1): 46.

습식법에 의한 Hydroxyapatite 분말제조와 그 분체특성

김종문, 김겸, 이서우

부산대학교 무기 재료공학과

Preparation and Characteristics of Hydroxyapatite Power by Wet Method

ABSTRACT

The hydroxyapatite powders were prepared by the reaction of Ca(CH3COO)2$.$H2O and H3PO4 in aqueous solution. Effect of Ca/P mole ration and pH value on the powder characteristics were investigated. For phosphoric acid was dissociated to PO43- ion above pH 10, the preparation condition of hydroxyapatite by H3PO4 solution had this value. Dried powders were agglomerated each other. The mean agglomerate particle diameter was minimum when the condition was pH 11, Ca/P=1.75 and its specific surface area was 97㎡/g. All powders had poor crystallinity and small CO2. It prevented CaCO3 from using aspirator in preparation and maturing time. In most cases, hydroxyapatite was decomposed into ${beta}$-TCP at more than 800$^{circ}C$, into ${alpha}$-TCP at 1200$^{circ}C$. However non-decomposed hydroxyapatite was remained in Ca/P=1.85.