Synthesis and Characterization of Silicon-Doped Hydroxyapatite

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  • Nakata Kentaro
    Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
  • Kubo Takashi
    Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
  • Numako Chiya
    Department of Natural system, Faculty of Integrated Science, Tokushima University
  • Onoki Takamasa
    Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
  • Nakahira Atsushi
    Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University Institute of Materials Research, Osaka Center, Tohoku University

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Abstract

Silicon was doped to hydroxyapatite by hydrothermal techniques for higher biocompatibility. Products contained tetra-ethyl-orthosilicate (TEOS) as a silicon source in the range of 0 to 15 mass%. In order to evaluate bioactivity of silicon-doped hydroxyapatite, the samples were soaked in simulated body fluid (SBF). Silicon doped samples showed faster apatite forming ability than the undoped samples. The samples were examined by transmission electron microscopy (TEM), X-ray diffraction patterns (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray absorption fine structure (XAFS). There results indicated that SiO44− ion substituted PO43− ion site in apatite structures. And it was found that appropriate TEOS doping ratio was 10 mass% for superior biocompatibility due to amorphous SiO2 segregation in the 15 mass% TEOS doped samples.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 50 (5), 1046-1049, 2009

    The Japan Institute of Metals and Materials

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