Superparamagnetic fine particles of iron oxide and magnetic reco

Details Superparamagnetic fine particles of iron oxide and magnetic reco Superparamagnetic fine particles of iron oxide and magnetic reco

1991-02-20

1993-08-17

Thibodeau, Paul J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

252 6256, 252 6258, 252 6259, 423633, 423634, 428404, B32B 900

Patent

active

052367835

ABSTRACT:
Disclosed herein is superparamagnetic fine particles of iron oxide having an unsaturated fatty acid adsorbed on the surface of superparamagnetic fine particles, and having a magnetization of not less than 50 emu/g, the rate of change of the magnetization of not more than 10%, and an Fe.sup.2+ content (calculated as Fe.sup.2+ /Fe.sup.3+ molar ratio) of 0.16-0.5.

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patent: 4810401 (1989-03-01), Mair et al.
patent: 5064550 (1991-11-01), Wyman

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