Metallic ferromagnetic particles for use in environmentally stab

Details Metallic ferromagnetic particles for use in environmentally stab Metallic ferromagnetic particles for use in environmentally stab

1974-08-28

1976-01-13

Pianalto, Bernard D.

Compositions

Magnetic

Free metal or alloy containing

427127, 428403, 428900, 252 6254, C09J 523

Patent

active

039322939

ABSTRACT:
Environmentally stable magnetic recording composition comprising fine metal particles based on iron, cobalt, or nickel, the particles having a chromium-based outer layer formed by exposing the particles to a solution containing dichromate or chromate ions under high-shear mixing conditions.

REFERENCES:
patent: 2809731 (1957-10-01), Rau
patent: 3342587 (1967-09-01), Goodrich et al.
patent: 3632512 (1972-01-01), Miller

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