Iron nitride magnetic powder and method of producing the powder

Details Iron nitride magnetic powder and method of producing the powder Iron nitride magnetic powder and method of producing the powder

2007-07-10

2007-07-10

Kiliman, Leszek (Department: 1773)

Stock material or miscellaneous articles

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

Particulate matter

C428S403000, C428S404000, C428S405000, C428S698000, C427S128000, C427S129000, C427S130000

Reexamination Certificate

active

10991511

ABSTRACT:
An iron nitride magnetic powder comprised primarily of Fe16N2phase is characterized in that its coercive force Hc is 200 KA/m or greater and bulk switching field distribution BSDF is 2 or less. The magnetic powder can be produced by allowing a nitriding reaction of Fe particles with a nitrogen-containing gas for producing nitrided particles of primarily Fe16N2phase to proceed under an increased pressure of 0.1 MPa or greater. The enhanced properties of the iron nitride magnetic powder make it suitable as a magnetic material for high-density magnetic recording media.

REFERENCES:
patent: 5225281 (1993-07-01), Tamai et al.
patent: 5605752 (1997-02-01), Matsubayashi
patent: 11-340023 (1999-12-01), None
patent: 2000-277311 (2000-10-01), None
patent: 2001-176715 (2001-06-01), None
patent: 03/079332 (2003-09-01), None

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