Ferromagnetic metallic powders useful for magnetic recording and

Details Ferromagnetic metallic powders useful for magnetic recording and Ferromagnetic metallic powders useful for magnetic recording and

1983-11-09

1985-02-05

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75251, 148105, B22F 900

Patent

active

044976542

ABSTRACT:
Ferromagnetic Fe-Ni alloy powders having the combination of a coercive force of 550-900 Oe (oersted) and a saturation flux density of 90-170 emu/g are provided by applying a nickel compound in a liquid to a particulate, oxygen-containing iron compound having an average particle length of 0.5-5 .mu.m and an average particle width of 0.02-0.5 .mu.m, and then drying and reducing the treated material to produce a metallic powder. The ferromagnetic powders are suitable for production of magnetic recording media because of the balanced magnetic properties.

REFERENCES:
patent: 3702270 (1972-11-01), Kawasaki et al.
patent: 4050962 (1977-09-01), Koester et al.
patent: 4305753 (1981-12-01), French
patent: 4306921 (1981-12-01), Suzuki et al.
patent: 4342589 (1982-08-01), Ohshima et al.
patent: 4404024 (1983-09-01), Suzuki et al.

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