Method of producing ferromagnetic metal powder by gaseous reduct

Details Method of producing ferromagnetic metal powder by gaseous reduct Method of producing ferromagnetic metal powder by gaseous reduct

1976-03-17

1977-08-23

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75 5AA, 75 5BA, 252 6255, 252 6256, 252 6258, 252 6259, H01F 102, C22C 104, B22F 300

Patent

active

040438465

ABSTRACT:
A method of producing ferromagnetic iron powder comprises the steps of dipping iron compound powder in a solution in which silicone oil is dissolved, removing solvent from the iron compound powder, reducing the iron compound powder in a reducing atmosphere at an elevated temperature and forming oxide layers on whole surfaces of the individual particles of the iron compound powder. Ferromagnetic iron powder produced according to this method has both a high coercive force and a high remanence ratio.

REFERENCES:
patent: 2651105 (1953-09-01), Neel
patent: 2744040 (1956-05-01), Altmann
patent: 3598568 (1971-08-01), Klomp et al.
patent: 3607218 (1971-09-01), Akashi et al.
patent: 3627509 (1971-12-01), Van Der Geissen
patent: 3702270 (1972-11-01), Kawasaki et al.
patent: 3725036 (1973-04-01), Ehrreich et al.
patent: 3843349 (1974-10-01), Ehrreich et al.

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