回転ボールミルによるBaTiO_3のサブミクロン粉砕 : ボール比重と固形分濃度の影響(<小特集>セラミック材料)

概要

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Submicron grinding of BaTiO_3 powder was studied by a ball mill with small balls. The balls used were 2 mm and 5 mm in diameter, and their specific gravity were 2.77 (glass), 3. 33 (TiO_2), 3. 60 (Al_2O_3), 3. 95 (ZrSi04), 5.70 (PSZ), and 7.71 (steel). In each case, it was shown that sub-micron grinding of BaTi03 powder was possible in short time. The grinding effect of 2 mm^φ balls was more efficient than that of 5 mm^φ. The following experimental equation was obtained. a=0.816ρ+0.569 (2mm^φ)a=0. 654ρ+0.316 (5mm^φ)where a is the grinding rate, p is the specific gravity. The concentration of BaTi03 powder in the slurry was Varied from 20 to 50wt%. The lower the concentration of BaTiO_3 powder, the higher the effect of grinding. In the case of low concentration, it was also possible to obtain submicron powder in short time.
社団法人日本材料学会の論文
1987-01-15