Process for preparing magnetic oxides

Details Process for preparing magnetic oxides Process for preparing magnetic oxides

1976-11-01

1979-03-20

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6257, 252 6262, 252 6263, 423633, 423634, 423594, C01G 4906

Patent

active

041453018

ABSTRACT:
This invention relates to a process for the preparation of magnetic oxides and possibly of at least one other metal. It relates also to new products consisting in mono- and polymetal magnetic oxides.
According to the invention a glycerin complex of iron and possibly at least one other metal is first prepared and the complex is decomposed into a mono- or polymetal magnetic oxide by hydrolysis or pyrolysis, the possibly decomposed glycerin complex being subjected to a thermal treatment, such as annealing or pyrolysis in an atmosphere of an inert gas, such as nitrogen.
The invention relates to magnetic oxides containing 0.2 to 3% by weight of carbon, said oxides preferably containing cobalt and possibly a rare earth element such as yttrium or europium.

REFERENCES:
patent: 3573980 (1971-04-01), Haller et al.
patent: 3928709 (1975-12-01), Audran et al.
patent: 3994819 (1976-11-01), Mollard et al.

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