MAGNETITE PARTICLES AND THEIR PRODUCTION - Mitsui Mining & Smelting Co., Ltd.

Title:

MAGNETITE PARTICLES AND THEIR PRODUCTION

Document Type and Number:

Japanese Patent JP3594160

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To obtain magnetite particles excellent in dispersibility by using magnetite having a specified compsn. and specified physical properties.
SOLUTION: The objective magnetite particles have an octahedral particle shape, ≤0.6μm average particle diameter, 40-1000e coercive force and ≤i1×104Ω.cm electric resistance and contain silicon by 0.1-3.0wt.% of the amt. of the magnetite particles. When the magnetite particles are dissolved by 20% (expressed in terms of Fe) from the surfaces of the particles, the total amt. of metals (Si, Al, Ti, Zr, Mn, Mg and Zn) other than Fe is preferably 0.5-4.5wt.% of the amt. of the magnetite particles.

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Inventors:

Masahiro Miwa
Takeshi Miyazono
Masachika Hashiuchi

Application Number:

JP24694596A

Publication Date:

November 24, 2004

Filing Date:

August 30, 1996

Export Citation:

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Assignee:

Mitsui Mining & Smelting Co., Ltd.

International Classes:

C01G49/00; C01G49/08; G03G9/083; H01F1/00; (IPC1-7): C01G49/08; C01G49/00; G03G9/083; H01F1/00

Domestic Patent References:

JP8101529A
JP8208237A
JP922143A

Attorney, Agent or Firm:

Tetsuya Ito

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