Process for preparing sulfur-containing ferromagnetic chromium o

Details Process for preparing sulfur-containing ferromagnetic chromium o Process for preparing sulfur-containing ferromagnetic chromium o

1975-04-09

1977-04-19

Cooper, Jack

Compositions

Magnetic

Chromium or chromium compound containing

423607, C01G 3702

Patent

active

040186903

ABSTRACT:
Modified ferromagnetic chromium oxide having an intrinsic coercive force above 150 Oersteds, a Curie temperature lower than that of unmodified chromium dioxide, and a specific magnetization in the range of 50-110 emu/gm., is prepared by heating material containing chromium (III) and sulfur in a form to yield upon oxidation a ferromagnetic chromium oxide with substitutional sulfur enhancing its magnetic properties.

REFERENCES:
patent: 3278263 (1966-10-01), Cox
patent: 3547823 (1970-12-01), Mihara et al.
patent: 3547824 (1970-12-01), Mihara et al.
patent: 3583917 (1971-06-01), Mihara et al.
patent: 3600314 (1971-08-01), Haines
patent: 3640871 (1972-02-01), Kawamata et al.
Kawamata, et al., "Japanese Journal of Applied Physics," vol. 12, No. 11, Nov. 1973, pp. 1737-1741.

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