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Journal of Advanced Ceramics

, Volume 1, Issue 1, pp 60–65 | Cite as

Preparation of hydroxyapatite ceramic through centrifugal casting process using ultra-fine spherical particles as precursor and its decomposition at high temperatures

  • Yanjie Zhang
  • Jinjun LuEmail author
  • Shengrong Yang
Open Access
Research Article

Abstract

Ultra-fine hydroxyapatite (HAp) powder with a diameter of about 10 nm was used as precursor for preparation of HAp ceramic. The precursor hydroxyapatite was single phase and highly crystallized without any additional thermal treatment. Highly densified HAp ceramic was fabricated through centrifugal infiltration casting (CIC), followed by pressureless sintering. The relative densities of compacts prepared at 1100°C and 1200°C were 77.8% and 94.1%, respectively. SEM micrographs of HAp ceramic sintered at 1100°C showed a porous microstructure with a grain size of 1 μm. HAp ceramic fabricated at 1200°C revealed a dense microstructure with nano-sized spherical α-TCP distributed at grain boundaries and triple points. The mechanism of decomposition from HAp to α-TCP at 1200°C was discussed on the basis of SEM, XRD and FTIR results.

Key words

hydroxyapatite bioceramics Centrifugal Infiltration Casting pressureless sintering 

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Copyright information

© The Author(s) 2012

This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  1. 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouChina
  2. 2.Graduate School of the Chinese Academy of SciencesBeijingChina

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