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Phase development and sintering behaviour of biphasic HA-TCP calcium phosphate materials prepared from hydroxyapatite and bioactive glass

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Abstract

The composites of hydroxyapatite (HA) with 2.5 and 5 wt% of a double oxide (50 mol% CaO and 50 mol% P2O5) glass were prepared using the conventional powder mixing and sintering method. The addition of the glass significantly enhanced the decomposition process of HA into alpha tricalcium phosphate (α-TCP) for bodies sintered at 1,300 and 1,350 °C and β-TCP phases for the ones sintered at 1,200, 1,250 and 1,300 °C. Microstructural characteristics, phase development and thermal behaviour were studied by SEM, XRD and STA. The effects of TCP phase content and phase transformation from β-TCP to α-TCP on the sintering are discussed. The characterizations revealed considerable content of TCP in the form of large semi-islands due to important reactions between the fine HA and the glass mixed powders.

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Acknowledgements

The authors are grateful for the financial and material support provided by the MERC. We thank the laboratory managers and technicians at the Ceramic, Semiconductor and Renewable energy Departments of the MERC. We thank especially Mr. E. Djabbari, M. Hasanzadeh, M. Kabiri and A. Keshavarz for excellent technical help and Mr. A. Rajabi for language assistance.

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Authors and Affiliations

  1. Materials and Energy Research Centre (MERC), P.O. Box 14155-4777, Tehran, Iran

    A. Behnamghader, N. Bagheri & B. Raissi

  2. Department of Biomedical Engineering, Amirkabir University of Technology, P.O. Box 15875-4413, Tehran, Iran

    F. Moztarzadeh

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  1. A. Behnamghader
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  2. N. Bagheri
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  3. B. Raissi
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  4. F. Moztarzadeh
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Correspondence to A. Behnamghader.

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Behnamghader, A., Bagheri, N., Raissi, B. et al. Phase development and sintering behaviour of biphasic HA-TCP calcium phosphate materials prepared from hydroxyapatite and bioactive glass. J Mater Sci: Mater Med 19, 197–201 (2008). https://doi.org/10.1007/s10856-007-3120-8

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  • DOI: https://doi.org/10.1007/s10856-007-3120-8

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