Dense/porous layered apatite ceramics prepared by post-sintering

Koji Ioku, Shigeyuki Somiya, Masahiro Yoshimura

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Abstract

Dense hydroxyapatite (HAp) ceramics with a porous layer were prepared from two types of HAp powders with different sinterability. The ceramics were prepared by post-sintering by HIP at 1000°C under 200 MPa of Ar for 1 h without any capsules, and after normal sintering in air at 1050°C for 3 h. The HAp powders with high sinterability synthesized hydrothermally provided the dense layer of the ceramics and the commercial HAp coarse powders with lower sinterability provided the porous layer. The dense layer showed transparency with over 99.9% relative density with a median grain size of 0.54 μm, while the porous layer of the ceramics showed about 43% porosity with a pore size of 1 to 10 μm.

Original languageEnglish
Pages (from-to)566-570
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume97
Issue number5
Publication statusPublished - 1989 Dec 1
Externally publishedYes

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ASJC Scopus subject areas

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

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