Hydrothermal synthesis of hydroxyapatite from octacalcium phosphate: Effect of hydrothermal temperature

Masanobu Kamitakahara, Natsuko Ito, Setsuaki Murakami, Noriaki Watanabe, Koji Ioku

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31 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)385-387
Number of pages3
JournalJournal of the Ceramic Society of Japan
Issue number1363
Publication statusPublished - 2009 Mar
Externally publishedYes


  • Crystallinity
  • Hydrothermal synthesis
  • Hydroxyapatite
  • Morphology
  • Octacalcium phosphate

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


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