Process for producing cobalt containing ferromagnetic iron oxide

Details Process for producing cobalt containing ferromagnetic iron oxide Process for producing cobalt containing ferromagnetic iron oxide

1982-07-23

1983-11-08

Cooper, Jack

Coating processes

Magnetic base or coating

252 6256, 427130, C01G 4906, B05D 512

Patent

active

044142455

ABSTRACT:
A process which comprises coating a cobalt compound or a combination of a cobalt compound and a ferrous compound on the surface of magnetic iron oxide particles and then heating the coated particles in the presence of water vapor. The cobalt containing ferromagnetic iron oxide produced by this process is excellent in coercivity and thermal stability. Further, magnetic tape produced from this iron oxide has a high coercivity and is excellent in squareness, orientability and remanent induction.

REFERENCES:
patent: 3725126 (1973-04-01), Haller et al.
patent: 4122216 (1978-10-01), Okazoe
patent: 4188302 (1980-02-01), Becker et al.
patent: 4287233 (1981-09-01), Rudolf et al.
"Funtai Oyobi Funmatsu Yakin," vol. 13, No. 3, pp. 20-25.

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