CT値によるヒドロキシアパタイト焼結体の均質性評価

概要

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Hydroxyapatite was prepared from calcium nitrate and disodium hydrogenphosphate solutions. Heating this at 1000℃ for 1 h yielded round-shaped hydroxyapatite particles with diameters of about 0.5 μm. A green compact of the hydroxyapatite (green compact-I) was fromed by an uniaxial compression process (300 kg/ cm^2), and then a green compact-II was made by an isotropic compression (1000 kg/cm^2) of the green compact-I. A hydroxyapatite sintered body (porous structure) was obtained by heating the green compact-II at 1150℃ for 2 h. Internal homogeneities of these green compacts and sintered bodies were evaluated from CT-values measured with a CT-scanner. Depending on the method proposed in this study to indicate homogeneity using the ratio of the standard deviation of linear absorption coefficient to linear absorption coefficient, the green compact-I was most homogeneous, followed by the green compact-II. The sintered body was comparatively inhomogeneous.
社団法人日本セラミックス協会の論文
1992-08-01