バリウムフェライトの磁界中乾式成型と添加物の影響

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タイトル別名
  • Dry Pressing of Barium Ferrite in the Orienting Field
  • バリウム フェライト ノ ジカイ チュウ カンシキ セイケイ ト テンカブツ ノ エイキョウ

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抄録

In the study of producing oriented barium ferrite magnets, the manufacturing procedures of dry pressing and the influence of addition of unfired powders and of oxides such as CuO, Al2O3 and Cr2O3 were examined. Water included in fine particles to be pressed has harmful effects on the degree of orientation. This effect is the greatest when the weight ratio of water to powder is about 0.1. On the contrary, in fully dried powders and powders suspended in water high degree of orientation is obtained by the pressing in orienting fields. We have studied dry pressing in particular, and have found the best conditions in the preliminary pressing under which we could orient the powders and make the binding solution permeate into the powders. Also good effects on magnetic properties of the specimens pressed in orienting fields and fired were obtained by addition of unfired powders of barium ferrite up to 10%, and the reason for it is discussed. Further, the influence of addition of oxides such as CuO, Al2O3 and Cr2O3 on the magnetic properties and the density is reported.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (7), 373-376, 1959

    公益社団法人 日本金属学会

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