Hydrothermal synthesis and characterization of hydroxyapatite from octacalcium phosphate

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

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26 Citations (Scopus)


Hydroxyapatite (HA) particles synthesized by hydrothermal treatment of octacalcium phosphate (OCP) particles were characterized in detail and the reaction mechanism was discussed. The calcium-deficient HA particles were firstly formed and their compositions gradually closed to the stoichiometric composition with reaction progress. While their compositions closed to the stoichiometric composition, split of plate-shaped HA particles into smaller strips and subsequent crystal growth of HA particles were observed. The [001] direction of synthesized HAwas parallel to the [001] direction of starting material of OCP. The hydrothermal treatment of OCP particles is useful for synthesis of plate-shaped HA particles with different morphologies and compositions.

Original languageEnglish
Pages (from-to)762-766
Number of pages5
JournalJournal of the Ceramic Society of Japan
Issue number1380
Publication statusPublished - 2010 Aug
Externally publishedYes


  • Composition
  • Hydrothermal treatment
  • Hydroxyapatite
  • Morphology
  • Octacalcium phosphate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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