Magnetic metallic powder containing iron and magnetic recording

Details Magnetic metallic powder containing iron and magnetic recording Magnetic metallic powder containing iron and magnetic recording

1977-08-26

1979-09-11

Ansher, Harold

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6255, 252 6256, 274 41A, 428457, 428539, 428900, H01F 108, B32B 1502, B32B 1518

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active

041675827

ABSTRACT:
A magnetic metallic powder which is essentially of iron or its alloy with at least one other metal and features a good resistance to oxidation by air as well as a large value for saturation magnetization is obtained by the reduction of an oxide powder prepared or treated in a basic liquid phase environment the oxide powder ultimately to have a pH value not smaller than 6.0. A magnetic recording medium consisting of a nonmagnetic base and a thin magnetic layer comprising the metallic powder dispersed in a polymer binder serves for high density recording purposes and long retains its excellent physical properties.

REFERENCES:
patent: 3958064 (1976-05-01), Brekken et al.
patent: 3973072 (1976-08-01), Anderson et al.
patent: 3977985 (1976-08-01), Umeki et al.
patent: 4020236 (1977-04-01), Aonuma et al.
patent: 4032682 (1977-06-01), Masson
patent: 4063000 (1977-12-01), Aonuma et al.
patent: 4069073 (1978-01-01), Tadokoro et al.
patent: 4069367 (1978-01-01), Umeki et al.
patent: 4074002 (1978-02-01), Hack et al.
patent: 4125474 (1978-11-01), Dezawa et al.

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