Hydrothermal preparation of porous hydroxyapatite with tailored crystal surface

K. Ioku, G. Kawachi, N. Yamasaki, M. Toda, H. Fujimori, S. Goto

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Porous sheets of hydroxyapatite (Ca10(PO)4(OH) 2; HA) with about 50 μm to 1 mm in thickness and porous HA granules of about 50 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105 °C under saturated vapor pressure of pure water. Porous HA sheets with about 75 % porosity prepared at 120 °C were composed of rod-shaped crystals of about 30 μm in length. Porous HA granules prepared at 160 °C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 μm in size. Both of materials were non-stoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.

Original languageEnglish
Pages (from-to)521-524
Number of pages4
JournalKey Engineering Materials
Volume288-289
Publication statusPublished - 2005 Jan 1
Externally publishedYes

Keywords

  • Artificial bone
  • Crystal
  • Hydrothermal
  • Hydroxyapatite
  • Porous material

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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