ギブサイトからのαアルミナ生成に及ぼす乾式粉砕及び種添加の影響

概要

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Effect on α-alumina formation from gibbsite powder by heating was investigated for dry-grinding of gibbsite powder and the gibbsite powder added α-alumina fine powder as a seed. Two powder samples were prepared so as to adjust α-alumina formation temperature to nearly the same temperature at 1100℃. The tranformation of intermediate alumina to α-alumina in the ground sample proceeded more homogeneous than that in the seeded sample. The particle size distribution of α-alumina powder calcined from the ground sample become narrower than that from the seeded sample, leading to the fromation of sintered body with homogeneous grain size. This may be due to both the formation of much more fine α-alumina particles as nuclei of transformation and to a good dispersion in the intermediate alumina powder by the grinding in comparison with seeding.
社団法人日本セラミックス協会の論文
1999-08-01