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Sintering of hydroxylapatite-zirconia composite materials

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Abstract

Sintering of hydroxylapatite-zirconia (doped with 3 mol% Y2O3) composite powder compacts was studied. Hydroxylapatite powder was prepared from Ca(OH)2 and H3PO4, and zirconia powder was prepared from ZrOCl2 · 8H2O and YCl3. The sinterability of hydroxylapatite-zirconia composite powder compacts depends strongly on differential shrinkage between the powder components of the composite. Smaller differential shrinkage results in better sinterability. By increasing the calcination temperature of zirconia powder and/or decreasing that of hydroxylapatite powder improves the sinterability of the composite powder compacts. The phase distribution and total amounts of crystal phases depend on the sintered density of compacts. Hydroxylapatite and cubic zirconia are the major phases of compacts with high sintered densities, whereas α- and β-tricalcium phosphate and CaZrO3 are the major phases of compacts with low sintered densities.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Tsing Hua University, 30043, Hsinchu, Taiwan

    Jenn -Ming Wu & Tung -Sheng Yeh

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  1. Jenn -Ming Wu
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  2. Tung -Sheng Yeh
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Wu, J.M., Yeh, T.S. Sintering of hydroxylapatite-zirconia composite materials. J Mater Sci 23, 3771–3777 (1988). https://doi.org/10.1007/BF00540526

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  • DOI: https://doi.org/10.1007/BF00540526

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