振動ボールミルによるBaTiO_3のサブミクロン粉砕

概要

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Submicron grinding of BaTiO_3 powder was studied with a vibration ball mill using alumina balls from 30 mm to 1 mm in diameter. BaTiO_3 clinker obtained by calcining of an equimolar mixture of BaCO_3 and TiO_2 was preground to 1.95μm. The average particle size was calculated from specific surface area measured by BET method. The results obtained are summarized as follows ; (1) Submicron grinding of BaTiO_3 powder was possible with small balls in short time on the factory base. (2) With balls of 1 mm in diameter, the minimum specific surface area diameter (D_3) was 0.026 μm in one milling operation. (3) The following empirical relation was obtained, log(SS) = -0.588 log r+1/2 logt +0.701 where SS is specific surface area, r is ball radius and t is time.
社団法人日本セラミックス協会の論文
1987-06-01