Magnetic particles comprising magnetite core and process for pro

Details Magnetic particles comprising magnetite core and process for pro Magnetic particles comprising magnetite core and process for pro

1994-10-04

1997-02-04

Le, Hoa T.

Stock material or miscellaneous articles

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

Particulate matter

252 6259, 428404, 428694BA, 428701, 428702, 428900, B32B 516

Patent

active

055996272

ABSTRACT:
Magnetic toner particles composed of magnetite core particles containing 0.10 to 1.00 wt % silicon and a hydrous coprecipiate of silica and alumina deposited or adhered on the surfaces of the magnetite core particles. The magnetic toner particles have an area-average diameter of 0.05 to 1.0 .mu.m.

REFERENCES:
patent: 4390361 (1983-06-01), Sueyoshi et al.
patent: 4497907 (1985-02-01), Halluin et al.
patent: 4740443 (1988-04-01), Nakahara et al.
patent: 4956220 (1990-09-01), Sueyoshi et al.
patent: 5356712 (1994-10-01), Hashiuchi et al.
patent: 5389482 (1995-02-01), Okano et al.
patent: 5411830 (1995-05-01), Matsunaga
Patent Abstracts of Japan, vol. 17, No. 659 7 Dec. 1993 & JP-A-05 213 620 (Mitsui Mining & Smelting Co.) 24 Aug. 1993 (Abstract).

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