Spindle-like magnetic iron oxide particles and process for produ

Details Spindle-like magnetic iron oxide particles and process for produ Spindle-like magnetic iron oxide particles and process for produ

1987-04-15

1989-10-10

Doll, John

Compositions

Magnetic

Iron-oxygen compound containing

C04B 3526

Patent

active

048730106

ABSTRACT:
Disclosed herein are magnetic iron oxide particles comprising spindle-like magnetite or maghemite particles having an aspect ratio(major:minor) of less than 4:1 and containing 0.1 to 20 atomic % of Si to Fe, and a process for producing the same.

REFERENCES:
patent: 3931007 (1976-01-01), Sugano et al.
patent: 3947502 (1976-03-01), Leitner et al.
patent: 3977985 (1976-08-01), Umeki et al.
patent: 4136158 (1979-01-01), Okuda et al.
patent: 4376714 (1983-03-01), Pingaud
patent: 4520069 (1985-05-01), Kitamoto et al.
Chemical Abstracts (CA): 90010u.
CA: 90011v.
CA: 201270a.
CA: 25215e.
CA: 38021p.

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