Process for producing nonstoichiometric ferroso-ferric oxides

Details Process for producing nonstoichiometric ferroso-ferric oxides Process for producing nonstoichiometric ferroso-ferric oxides

1978-05-22

1980-06-24

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6256, C01G 4908

Patent

active

042094127

ABSTRACT:
Magnetic, acicular, nonstoichiometric ferroso-ferric oxide particles having a unique combination of chemical, physical and magnetic properties and a process for producing the same are described. The ferroso-ferric oxide particles have a ferrous:ferric atomic ratio ranging from 0.05:1 to 0.25:1 and contain, based on total iron, 0.4 to 5.0 atomic % phosphorus, 2.0 to 10.0 atomic % zinc and 0 to 10.0 atomic % cobalt.

REFERENCES:
patent: 3573980 (1971-04-01), Haller et al.
patent: 3931025 (1976-01-01), Woditsch et al.
patent: 3953656 (1976-04-01), Tokuoka et al.
patent: 4053325 (1977-10-01), Vanderheiden
patent: 4066564 (1978-01-01), Sasazawa et al.
patent: 4082905 (1978-04-01), Stephan et al.

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