Preparation of hydroxyapatite ceramics by hydrothermal hot-pressing technique

Kazumichi Yanagisawa, Kongjun Zhu, Takahiro Fujino, Ayumu Onda, Koji Kajiyoshi, Koji Ioku

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


The hydrothermal hot-pressing (HHP) technique was used to prepare hydroxyapatite (HAp) ceramics from a HAp powder with low crystallinity, and the effects of processing factors such as temperature, loading pressure and reaction time on densification were investigated. The crystallinity of HAp was increased by the HHP treatments. With the increase in reaction temperature, loading pressure and reaction time, the density and Vickers hardness of the compacts increased. The HAp compact with high relative density of 83% and high Vickers hardness of 2.9 GPa was successfully prepared by the HHP treatment at 200°C for 3 h under loading pressure of 60 MPa.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalKey Engineering Materials
Volume309-311 I
Publication statusPublished - 2006
Externally publishedYes


  • Hydrothermal hot-pressing
  • Hydroxyapatite; densification

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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