Abstract
Nano-sized hydroxyapatite (HAp) powders were synthesized by a microwave-hydrothermal method using H₃PO₄ and Ca(OH)₂ as starting materials. The applied microwave powers and mole ratio of Ca/P were served as powerful factors in the synthesis of calcium phosphate. In the case of relatively low microwave power of 450 W and Ca/P ratio of 1.57, the mixed calcium phosphate compounds were detected in the synthesized powders. But in the case of running at 550 W and 1.67(Ca/P), the synthesized powder showed the monophase of HAp having two kinds of morphologies. One was a needle shape with 5~15 ㎚ in width and 20~50 ㎚ in length, and the other was a spherical shape of 10~40 ㎚ in diameter.
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