B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
117/46.1
B22F 1/02 (2006.01) B22F 9/20 (2006.01) C09D 5/23 (2006.01) G11B 5/706 (2006.01) G11B 5/712 (2006.01) H01F 1/06 (2006.01)
Patent
CA 2039899
Abstract A magnetic metal powder, having a large specific surface are, a high coersive force, a high dispersi- bility and an excellent corrosion resistance, is produced by converting an aciculate goethite having a silicon and/or aluminum compound layer formed thereon or an aciculate goethite modified with a metal other than iron into magnetite, forming thereon a nonferrous transition metal compound layer, further forming thereon a silicon or aluminum compound layer, and reducing the coated magnetite to prepare a magnetic metal powder mainly composed of iron and having on the surface thereof a layer containing a nonferrous transition metal element, characterized in that the formation of the silicon and/or aluminum compound layer on the aciculate goethite and/or the formation of the nonferrous transition metal layer on the magnetite are conducted while conducting dispersion by means of a disperser.
Aoki Yoshio
Ichikawa Hiroaki
Kadono Yasuo
Kojima Katsuo
Nakamura Hiroyuki
Aoki Yoshio
Ichikawa Hiroaki
Kadono Yasuo
Kao Corporation
Kojima Katsuo
LandOfFree
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