Preparation and dielectric property of sintered monoclinic hydroxyapatite

Toshiyuki Ikoma, Atsushi Yamazaki, Satoshi Nakamura, Masaru Akao

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


A preparation method of sintered monoclinic hydroxyapatite, Ca10(PO4)6(OH)2 is presented and its dielectric properties at various temperatures and/or frequencies are discussed. Sintered monoclinic hydroxyapatite showed two dielectric-loss peaks which can be attributed to reorientation of hydroxyl ions and defects of hydroxyl ions due to formation of oxyapatite. A dielectric anomaly at 483 K was observed, being consistent with the phase transition that change the hydroxyl dipole moments; the hydroxyl dipole moment is ordered at temperature lower than 483 K and that is disordered at temperatures higher than 483 K.

Original languageEnglish
Pages (from-to)1225-1228
Number of pages4
JournalJournal of Materials Science Letters
Issue number15
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Materials Science(all)


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