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Journal of Advanced Ceramics 2012, 1(1): 60-65 https://doi.org/10.1007/s40145-012-0006-0
Research Article | Open Access | Issue | Published: 29 June 2012

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

Show Author's Information Yanjie ZHANGa,b,  Jinjun LUa,*( ),  Shengrong YANGa
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Keywords:
hydroxyapatite, bioceramics, Centrifugal Infiltration Casting, pressureless sintering
Cite this article:
ZHANG Y, LU J, YANG S. Preparation of hydroxyapatite ceramic through centrifugal casting process using ultra-fine spherical particles as precursor and its decomposition at high temperatures. Journal of Advanced Ceramics, 2012, 1(1): 60-65. https://doi.org/10.1007/s40145-012-0006-0
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Abstract Full text About this article

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.


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About this article

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

Show Author's information Yanjie ZHANGa,b, Jinjun LUa,*( ), Shengrong YANGa
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

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.

Keywords: hydroxyapatite, bioceramics, Centrifugal Infiltration Casting, pressureless sintering

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Publication history

Received: 13 April 2011
Accepted: 15 November 2011
Published: 29 June 2012
Issue date: March 2012

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© The author(s) 2012

Acknowledgements

The authors acknowledge the financial support for this work from China-Ukraine Inter-governmental S&T Cooperation by Ministry of Science and Technology of China (CU08-15).

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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.

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