Composite soft magnetic material

Details Composite soft magnetic material Composite soft magnetic material

1993-02-01

1994-09-20

Nakarani, D. S.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

252 6258, 252 6259, 419 35, 419 56, 419 57, 428329, 428331, 428336, 428404, 428689, 428900, B32B 516, B22F 100, B22F 102, H01F 122

Patent

active

053488008

ABSTRACT:
A composite soft magnetic material is produced from soft magnetic metal (e.g., Sendust) particles by coating the particles with a non-magnetic metal oxide (e.g., .alpha.-alumina) in a mechano-fusion manner, or heat treating the particles to form a diffusion layer of .alpha.-alumina thereon, coating the coated particles with a high resistance soft magnetic substance (e.g., ferrite), and sintering the double coated particles under pressure as by hot pressing or plasma activated sintering. It exhibits high saturation magnetic flux density, magnetic permeability, and electric resistivity. The non-magnetic metal oxide intervening between the soft magnetic metal and the high resistance soft magnetic substance is effective in reducing core loss.

REFERENCES:
patent: 4320080 (1982-03-01), Esper et al.
Patent Abstracts of Japan, vol. 11, No. 36 (E-477) (2483), Feb. 3, 1987, JP-61 204 906, Sep. 11, 1986.
Patent Abstracts of Japan, vol. 15, No. 429 (C-880), Oct. 31, 1991, JP-31 80 434, Aug. 6, 1991.

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