Densification and superplasticity of hydroxyapatite ceramics

Keiichiro Tago*, Kiyoshi Itatani, Tohru S. Suzuki, Yoshio Sakka, Seiichiro Koda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Fabrication conditions for high-density and fine-grained hydroxyapatite (Ca10 (PO4)6(OH)2: HAp) ceramic were examined; the tensile elongation of HAp ceramic during heating was measured in order to evaluate its possible superplastic behavior. The HAp compact was fired in air at a temperature between 1100 and 1200°C for 5 h. The relative density of HAp compact fired at 1100°C for 5 h showed a maximum (99.2%), whereas the average grain size was as small as 0.56 μm. The tensile elongation of this HAp specimen was tested at a temperature between 940 and 1100°C. The tensile elongations tested at 1050 and 1100°C attained 156 and 157%, respectively; the specimen tested at 1050°C contained a limited number of cavities, whereas the specimen tested at 1100°C was observed to have a large number of cavities.

Original languageEnglish
Pages (from-to)669-673
Number of pages5
JournalJournal of the Ceramic Society of Japan
Issue number1322
Publication statusPublished - 2005 Oct
Externally publishedYes


  • Fine grains
  • High density
  • Hydroxyapatite
  • Superplasticity
  • Tensile elongation

ASJC Scopus subject areas

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


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