Process for the preparation of ferrite magnetic particulate for

Details Process for the preparation of ferrite magnetic particulate for Process for the preparation of ferrite magnetic particulate for

1984-02-14

1985-01-15

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6256, 252 6262, 252 6263, 423594, C04B 3526

Patent

active

044937792

ABSTRACT:
A process for the preparation of a ferrite magnetic particulate for magnetic recording which comprises steps of: (1) melting a starting material mixture containing a basic component for hexagonal ferrite, a coercive force-reducing component and a glass-forming component; (2) rapidly cooling the resulting molten mixture to obtain an amorphous material; (3) heat-treating said amorphous material to form ferrite crystals; and (4) removing components other than the ferrite crystals from the material resulting from said heat-treatment:

REFERENCES:
patent: 4124735 (1978-11-01), O'Horo
patent: 4140645 (1979-02-01), Beall et al.
patent: 4233169 (1980-11-01), Beall et al.
patent: 4341648 (1982-07-01), Kubo et al.
patent: 4407721 (1983-10-01), Koike et al.

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