Author(s)

Atsushi Nakahira, Kentaro Nakata, Chiya Numako, Hidenobu Murata, Katsuyuki Matsunaga

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Effect of SiO₂ addition on the microstructures of calcium-deficient hydroxyapatite prepared by the heat-treatments was examined. Obtained hydroxyapatites substituted with Si ion were characterized by XRD, FT-IR and XAFS measurements. XANES results of Si K-edge and P K-edge in these modified hydroxyapatites indicated the shift of peaks of P K-edge with the SiO₂ contents, although no change of Si local structures. In this study, the effect of Si ion on micro- and local structure of hydroxyapatite with SiO₂ addition was mainly clarified.

Hydroxyapatite, SiO₂, XAFS, Local Structure

A. Nakahira, K. Nakata, C. Numako, H. Murata and K. Matsunaga, "Synthesis and Evaluation of Calcium-Deficient Hydroxyapatite with SiO₂," Materials Sciences and Applications, Vol. 2 No. 9, 2011, pp. 1194-1198. doi: 10.4236/msa.2011.29161.