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Sintering of bioceramics using a modified domestic microwave oven

Natural hydroxyapatite sintering

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Abstract

In this study, hydoxyapatite (HA) prepared from calcined bovine bone was studied. Two methods were used for HA sintering: conventional sintering (CS) and microwave sintering (MS). HA was obtained by calcination of bovine bone at 800 °C for 4 h followed by wet ball milling. Afterwards, the powder was compacted under 75 MPa and sintered for 2 h at different temperatures, from 1050 to 1200 °C. It has been found that the bulk density of HA increases by increasing sintering temperature when both CS and MS were used. Nevertheless, at the same temperature and for a shorter time (15 min), the HA sintered by microwave were characterised by a density relatively higher than that of sintered by conventional furnace. For example, at 1100 °C the bulk densities of samples using CS and MS were about 2.49 (for 120 min) and 2.93 (for 15 min) g/cm3, respectively. Furthermore, a near theoretical density (98.6%) was obtained when HA samples were sintered at 1200 °C for 15 min only but using the proposed MS, which was much higher than that (89.7%) of HA samples sintered at the same temperature for longer holding time (120 min). Besides this, the X-ray analyses have shown that heat-treatment, using these two processes, has lead to HA decomposition into tricalcium phosphate and/or tetracalcium phosphate.

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Authors and Affiliations

  1. Ceramics Laboratory, Mentouri University, Constantine, 25000, Algeria

    Abdelhamid Harabi, Djamel Belamri, Noureddine Karboua & Fatima-Zohra Mezahi

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  1. Abdelhamid Harabi
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  2. Djamel Belamri
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  3. Noureddine Karboua
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  4. Fatima-Zohra Mezahi
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Correspondence to Abdelhamid Harabi.

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Harabi, A., Belamri, D., Karboua, N. et al. Sintering of bioceramics using a modified domestic microwave oven. J Therm Anal Calorim 104, 383–388 (2011). https://doi.org/10.1007/s10973-010-1115-z

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  • DOI: https://doi.org/10.1007/s10973-010-1115-z

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