Magnetic core for pulse transformer and pulse transformer made t

Details Magnetic core for pulse transformer and pulse transformer made t Magnetic core for pulse transformer and pulse transformer made t

1994-07-20

1998-03-10

Sheehan, John

Metal treatment

Stock

Magnetic

148305, 420117, 420121, H01F 1147

Patent

active

057256861

ABSTRACT:
A pulse transformer comprising a magnetic core formed of a thin strip of nanocrystalline soft magnetic alloy in which fine nanocrystalline grains having a grain size of not more than 50 nm occupy at least 50 volume % of the structure, characterized in that the AC relative initial magnetic permeability at -20.degree. C. and 50.degree. C. is not less than 50000.

REFERENCES:
patent: 4985088 (1991-01-01), Okamura et al.
patent: 5067991 (1991-11-01), Sawa et al.
patent: 5178689 (1993-01-01), Okamura et al.
patent: 5192375 (1993-03-01), Sawa et al.
Patent Abstracts of Japan, vol. 11, No. 159 (C-423), 22 May 1987.
Intermag 93, 13 Apr. 1993, Stockholm SW, p. AD07, W.K. Pi et al, "Magnetic Properties of Fe.sub.73.5 Cu.sub.1 Nb.sub.3 (Si.sub.0.6 B.sub.1-x).sub.22.5 (x=0.4-0.8) Alloy Ribbons Quenched at Different Melting Temperatures".
IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993, New York, US, pp. 2670 to 2672, O. Heczko et al, "Magnetic Properties of Compacted Alloy Fe.sub.73.5 Cu.sub.1 Nb.sub.3 Si.sub.13.5 B.sub.9 in Amorphous . . . State".

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