Cobalt-containing ferromagnetic iron oxide powder and process fo

Details Cobalt-containing ferromagnetic iron oxide powder and process fo Cobalt-containing ferromagnetic iron oxide powder and process fo

1987-01-15

1988-09-27

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, 252 6263, 252 6264, C04B 3526

Patent

active

047740124

ABSTRACT:
A cobalt-containing ferromagnetic iron oxide powder of which constituent particles each is an aggregate of cobalt-containing ferromagnetic iron oxide micorparticles and has a spherical shape of 5 to 200 .mu.m in diameter has an angle of repose of 35.degree. or smaller and accordingly excellent flowability, as well as to a process for producing the iron oxide powder, are provided. This ferromagnetic iron oxide powder consisting of spherically shaped particles, are easily dispersed in an organic binder to return to the original state of microparticles, and provide improved magnetic characteristics when used as a material for magnetic recording media such as a magnetic tape and the like.

REFERENCES:
patent: 4226843 (1980-10-01), Watanabe et al.
patent: 4336242 (1982-06-01), Schmidberger et al.

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