Magnetic powder for magnetic recording medium

Details Magnetic powder for magnetic recording medium Magnetic powder for magnetic recording medium

1981-09-09

1983-12-27

Cooper, Jack

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

252 6256, 427127, 428900, 428693, 428694, C01G 4906

Patent

active

044231148

ABSTRACT:
A magnetic powder for a magnetic recording medium which is a cobalt-adsorbed magnetic iron oxide having a coercive force of 1000 Oe or more and a ratio of a coercive force at -196.degree. C. to a coercive force at room temperature of 3 or less.

REFERENCES:
patent: 4224175 (1980-09-01), Montino et al.
patent: 4287233 (1981-09-01), Rudolf et al.
patent: 4302510 (1981-11-01), Umeki

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