ゾル-ゲル法を用いた酸化アルミニウム複合型ヒドロキシアパタイト粉末の作製

概要

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Hydroxyapatite powders (HAp ; Ca_<10>(PO_4)_6(OH)_2) hybridized with 0-5 mass% Al_2O_3 were prepared from calcium hydroxide and di-ammonium hydrogenphosphate by a wet chemical synthesis. Ethylacetoacetate Aluminum Diisopropoxide (Al(OC_3H_7)_2(C_6H_9O_3)) was used as a source for aluminum oxide. The obtained powders were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) specific surface area measurement, and magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR). The X-ray diffraction patterns showed no Al_2O_3-peaks irrespective of Al_2O_3 content, suggesting that the Al_2O_3-hybridized HAp powders were single phase. The Al_2O_3-hybridized HAp powder had larger specific surface area. According to MAS-NMR analysis, it was considered that the aluminum element existed as aluminum oxide, it was not substituted for the Ca^<2+>, PO_4^<3->, or OH^-ions.
社団法人日本セラミックス協会の論文
2005-03-01