High magnetization aqueous ferrofluids and processes for prepara

Details High magnetization aqueous ferrofluids and processes for prepara High magnetization aqueous ferrofluids and processes for prepara

1996-07-01

1997-09-16

Bonner, Melissa

Compositions

Magnetic

Flaw detection or magnetic clutch

252 6754, H01F 128

Patent

active

056677162

ABSTRACT:
A ferrofluid comprising an aqueous suspension of an unsilanated or silanated nanocomposite comprised of Fe.sub.2 O.sub.3 nanoparticles and an ionic exchange resin, wherein the ferrofluid has a high magnetization moment of about 20 to about 40 emu/gram.

REFERENCES:
patent: 4474866 (1984-10-01), Ziolo
patent: 4992190 (1991-02-01), Shtarkman
patent: 5013471 (1991-05-01), Ogawa
patent: 5219554 (1993-06-01), Groman et al.
patent: 5354488 (1994-10-01), Shtarkman
patent: 5457523 (1995-10-01), Facci et al.

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