強磁場配向した球形アルミナ粒子成形体の異方焼結収縮

概要

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Spherical alumina particle compacts were prepared by drying alumina slurry in high magnetic field (0-10T) and cold isostatic pressing (CIP). Anisotropy of shrinkage during sintering was examined for the alumina compacts in detail. The spherical alumina particle compact prepared in 10 T showed sintering shrinkage anisotropy. The sintering shrinkage was larger in the direction parallel to magnetic field direction (i.e., the c-axis direction of alumina crystal) than that in its perpendicular direction. On the other hand, isotropic sintering shrinkage occurred in the compacts prepared in 0 T. The experimental results indicate that the sintering shrinkage of spherical alumina particle compact depends on alumina crystal axis direction. Origin of the sintering shrinkage anisotropy for the spherical alumina particle compacts can be attributed to the particle orientation caused by high magnetic field.
社団法人日本セラミックス協会の論文
2006-03-01