Effect of pH on the Synthesis of Hydroxyapatite

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J. Korean Ceram. Soc. > Volume 28(11); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(11): 885.

수산화아파타이트 합성시 pH의 영향

김수룡, 이병민, 박용갑

쌍용중앙연구소

Effect of pH on the Synthesis of Hydroxyapatite

ABSTRACT

Calcium hydroxyapatite have been synthesized by a direct precipitation reaction between 0.05 M calcium hydroxide suspension and 0.3 M orthophosphoric acid solution. 0.01 M calcium hydroxide solution was added during the reaction in order to increase the total Ca/P mol ration and reaction pH of the solution. The stoichiometric hydroxyapatite was synthesized over 1.75 as total Ca/P mol ratio, but the calcium-deficient hydroxyapatite was prepared under 1.725 as total Ca/P mol ratio. The nonstoichiometry of the precipitates were interpreted in terms of the pH change during the reaction.