非化学量論アパタイト焼結体の微細構造と機械的性質並びに原料粉末の焼結性

概要

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Sinterability of non-stoichiometric calcium Hydroxyapatite (Ca-HAP) prepared by the conventional solution reaction was studied, and microstructure and mechanical properties such as compressive strength, Vickers hardness, and fracture toughness of sintered bodies were examined. Sinterability and grain growth rate of Ca-HAP decreased with decreasing Ca/P ratio. Tricalcium phosphate (TCP) formed in the sintering process of the non-stoichiometric Ca-HAP. The amount and morphology of TCP were dependent on the Ca/P ratio. The non-stoichiometric Ca-HAP with Ca/P=1.655 heat-treated at 1100℃ gave compressive strength and fracture toughness higher than those in literatures. The maximum compressive strength (mean value) and fracture toughness (mean value) were 10300 kgf/cm^2 and 1.52 MPa・m^<1/2>, respectively.
社団法人日本セラミックス協会の論文
1988-05-01