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

1985-11-04

1987-09-01

Lechert, Jr., Stephen J.

Compositions

Magnetic

Iron-oxygen compound containing

252 6259, 252 6262, 252 6263, 264DIG58, C04B 3526

Patent

active

046907688

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:

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patent: 4411807 (1983-10-01), Watanabe et al.
patent: 4493779 (1985-01-01), Kamiyama
patent: 4493874 (1985-01-01), Kubo et al.
patent: 4543198 (1985-09-01), Kamiyama
patent: 4551260 (1985-11-01), Hayakawa et al.
patent: 4569775 (1986-02-01), Kubo et al.

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