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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.116  No.1349 (January) (2008)  >  pp.6-9

Journal of the Ceramic Society of Japan
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Preparation of hydroxyapatite porous ceramics with different porous structures using a hydrothermal treatment with different aqueous solutions

Masanobu KAMITAKAHARA1), Chikara OHTSUKI2), Giichiro KAWACHI2), Deping WANG3) and Koji IOKU1)
1) Graduate School of Environmental Studies, Tohoku University
2) Graduate School of Engineering, Nagoya University
3) School of Material Science and Engineering, Tongji University

  Hydroxyapatite (HA) porous ceramics are useful for bone regeneration because HA shows a bone-bonding capability. The preparation of HA porous ceramics with controlled pore structures was attempted using a hydrothermal treatment of porous ceramics consisting of alpha tricalcium phosphate (α-TCP). The α-TCP porous ceramics were hydrothermally treated with various aqueous solutions containing NaCl, CaCl2, Na3PO4, Na2HPO4, NaH2PO4, or H3PO4 at 150°C for a period of 10 h. The α-TCP phase of the porous ceramics was transformed into HA by the hydrothermal treatment in ultrapure water, NaCl, CaCl2, Na3PO4 or Na2HPO4 solutions, to form porous ceramics consisting of rod-shaped HA particles. The size of the rod-shaped HA particles prepared in Na3PO4 or Na2HPO4 solutions was smaller than that prepared in ultrapure water, NaCl, or CaCl2 solutions. The α-TCP phase of the porous ceramics was transformed into a biphase consisting of HA and monetite (DCPA) after treatment in NaH2PO4 solution, and into DCPA in the H3PO4 solution, resulting in porous ceramics consisting of plate-shaped particles. These results indicate that we could control the size and shape of the HA particles using the hydrothermal conditions, and this also provides a way of controlling the porous structure of the HA porous ceramics.

Hydroxyapatite, Tricalcium phosphate, Hydrothermal tretment, Pore structure, Morphology

Received: October 01, 2007
Accepted: November 15, 2007 , Published online: January 01, 2008
Copyright (c) 2008 The Ceramic Society of Japan



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