Magnetite particles

Details Magnetite particles Magnetite particles

1992-09-03

1994-10-18

Cooper, Jack

Stock material or miscellaneous articles

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

Particulate matter

252 6259, C01G 4908

Patent

active

053567129

ABSTRACT:
This invention provides magnetite particles containing a silicon component inside and also a silicon component exposed on the surface of each particle, which are improved in the properties of electrical resistance, remanent magnetization, and fluidity in a well-balanced way and suited for use principally as powdery material for magnetic toner for electrostatic copying and as black pigment powder for coating materials; and also relates to a process for producing the particles.

REFERENCES:
patent: 4321302 (1982-03-01), Umeki et al.
patent: 4873010 (1989-10-01), Takedoi et al.
patent: 4975214 (1990-04-01), Sakashita et al.
Patent Abstracts of Japan, vol. 12, No. 172 (C-497)(3019) May 21, 1988 & JP-A-62 278 131 (Canon) Dec. 3, 1987 *abstract*.
Patent Abstracts of Japan, vol. 12, No. 219 (C-506)(3066) Jun. 22, 1988 & JP-A-63 017 222 (Toda Kogyo) Jan. 25, 1988 *abstract*.
Patent Abstracts of Japan, vol. 10, No. 185 (C-357) 27 Jun. 1986 & JP-A-61 034 070 (Titan Kogyo KK) Feb. 18, 1986 *abstract*.
Patent Abstracts of Japan, vol. 11, No. 52 I(P-548)(2499) Feb. 18, 1987 & JP-A-61 219 959 (Canon) Sep. 30, 1986 *abstract*.

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