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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1363 (March) (2009)  >  pp.385-387

Journal of the Ceramic Society of Japan
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Hydrothermal synthesis of hydroxyapatite from octacalcium phosphate: effect of hydrothermal temperature

Masanobu Kamitakahara1), Natsuko ITO1), Setsuaki MURAKAMI1), Noriaki WATANABE1) and Koji IOKU1)
1) Graduate School of Environmental Studies, Tohoku University

  Hydroxyapatite (HA) was synthesized by the hydrothermal treatment of octacalcium phosphate (OCP). Powder of OCP was hydrothermally treated with distilled water at 120-240°C for 3-24 h. Only diffraction lines assigned to HA were detected by X-ray diffraction (XRD) even after the treatment at 120°C for 3 h. The crystallinity of the formed HA increased with increasing the treatment temperature and period. Plate-shaped particles were split into small strip-shaped particles by the hydrothermal treatment and this phenomenon was obvious when the treatment temperature was high and the period was long. However, the plate-shape morphology was remained when OCP was transformed to HA at 120°C for 3 h. The hydrothermal treatment of OCP is useful to synthesize the plate-shaped HA particles in a short period.

Hydroxyapatite, Octacalcium phosphate, Hydrothermal synthesis, Morphology, Crystallinity

Received: November 25, 2008
Accepted: January 15, 2009 , Published online: March 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan



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