Process for producing magnetic powder having high coercive force

Details Process for producing magnetic powder having high coercive force Process for producing magnetic powder having high coercive force

1980-09-26

1982-12-14

Pianalto, Bernard D.

Coating processes

Magnetic base or coating

427128, 427130, 427214, 427215, 427343, 427380, B05D 512

Patent

active

043638317

ABSTRACT:
A magnetic iron oxide powder which has high coercive force and stable magnetic characteristics is produced by forming a surface layer of the magnetic iron oxide powder which comprises a cobalt compound as a main component. The magnetic iron oxide powder is treated with an aqueous solution of a cobalt ion for two times or more to form at least two surfaces comprising the cobalt compound.

REFERENCES:
patent: 4125474 (1978-11-01), Dezawa et al.

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