Powder magnetic core

Details Powder magnetic core Powder magnetic core

1995-07-20

1997-07-29

Sheehan, John

Metal treatment

Stock

Magnetic

252 6254, 252 6255, H01F 124

Patent

active

056518412

ABSTRACT:
A powder magnetic core having reduced core losses and increased mechanical strength is provided at low costs. The core is obtained by compressing a ferromagnetic metal powder and an insulating agent and then annealing the compressed body. The ferromagnetic metal powder is made up of a substantially spherical form of ferromagnetic metal particles containing Fe, Al and Si. The core has a permeability of at least 50 at 100 kHz, a core loss of up to 450 kW/m.sup.3 at 100 kHz in an applied magnetic field of 100 mT, and a core loss of up to 300 kW/m.sup.3 at 25 kHz in an applied magnetic field of 200 mT.

REFERENCES:
patent: 4177089 (1979-12-01), Bankson
patent: 4502982 (1985-03-01), Horie et al.
Japan Electronic Materials Society, 31st Autumn Conference Summaries, pp. 126-130, Nov. 1 and 2, 1994, N. Kawakubo, et al., "Low Loss Powder Magnetic Core".

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