Process for producing ferro-magnetic metal particles

Details Process for producing ferro-magnetic metal particles Process for producing ferro-magnetic metal particles

1980-05-05

1982-03-09

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75 05AA, 75 05BA, H01F 102

Patent

active

043187579

ABSTRACT:
Ferromagnetic metal particles of high quality are produced by a process which comprises heat-treating starting material particles selected from the group consisting of the particles of ferromagnetic metals, ferromagnetic alloys, and oxides and hydroxides of ferromagnetic metals, in a reducing atmosphere at a temperature required for converting the material particles into ferromagnetic metal particles of improved magnetic properties. Electrostatic charges are imparted to the material particles during the heat treatment, whereby aggregation of material particles is hindered during the treatment.

REFERENCES:
patent: 3661554 (1972-05-01), Wijard et al.
patent: 3966454 (1976-06-01), Ito et al.
patent: 3967986 (1976-07-01), Rau et al.
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4213777 (1980-07-01), Grebe et al.

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