Process for the production of powdered magnetic material

Details Process for the production of powdered magnetic material Process for the production of powdered magnetic material

1972-05-30

1976-05-18

Pianalto, Bernard D.

Stock material or miscellaneous articles

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

Particulate matter

427128, 427132, 428900, H01F 106

Patent

active

039580687

ABSTRACT:
A process is disclosed for the production of powdered magnetic material for use in magnetic recording materials. The process comprises the steps of dispersing finely divided particles of a ferromagnetic oxide into an aqueous solution, dissolving therein salts of one or more ferromagnetic metals and a water soluble reducing agent, and then heating the dispersion while stirring to form and deposit a coating of the ferromagnetic metal (or alloy) on the surface of the finely divided particles of ferromagnetic oxide.

REFERENCES:
patent: 2809731 (1957-10-01), Rau
patent: 3139354 (1964-06-01), Wolff
patent: 3556839 (1971-01-01), Roy
patent: 3632512 (1972-01-01), Miller
patent: 3718594 (1973-02-01), Miller

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