Paper Title:
Hydrothermal Preparation of Porous Hydroxyapatite with Tailored Crystal Surface
  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 nonstoichiometric 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.

  Info
Periodical
Key Engineering Materials (Volumes 288-289)
Edited by
Xingdong Zhang, Junzo Tanaka, Yaoting Yu and Yasuhiko Tabata
Pages
521-524
DOI
10.4028/www.scientific.net/KEM.288-289.521
Citation
A. Iuga, G. Kawachi, N. Yamasaki, M. Toda, H. Fujimori, S. Goto, "Hydrothermal Preparation of Porous Hydroxyapatite with Tailored Crystal Surface", Key Engineering Materials, Vols. 288-289, pp. 521-524, 2005
Online since
June 2005
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$32.00
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