Compositions – Magnetic – Iron-oxygen compound containing
Patent
1991-09-19
1995-01-03
Cooper, Jack
Compositions
Magnetic
Iron-oxygen compound containing
252 6256, 252 6257, 252 6258, 252 6259, 252 626, 252 6263, 252 6264, C04B 3526
Patent
active
053783840
ABSTRACT:
The present invention provides a hexagonal magnetic ferrite pigment suitable for high density magnetic recording applications. The pigment is characterized by small particle size, a modified magnetoplumbite structure, and relatively high magnetic moment. The pigment is capable of being prepared by firing suitable precursor particles in air at temperatures below 850.degree. C.
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Dierssen Gunther H.
Hopstock David M.
Roden John S.
Sapieszko Ronald S.
Cooper Jack
Griswold Gary L.
Kagan David B.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
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