Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2005-05-24
2005-05-24
Sheehan, John P. (Department: 1742)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C252S062550, C148S304000, C148S403000
Reexamination Certificate
active
06897718
ABSTRACT:
A magnetic powder core comprises a molded article of a mixture of a glassy alloy powder and an insulating material. The glassy alloy comprises Fe and at least one element selected from Al, P, C, Si, and B, and has a texture primarily composed of an amorphous phase. The glassy alloy exhibits a temperature difference ΔTx, which is represented by the equation ΔTx=Tx−Tg, of at least 20 K in a supercooled liquid, wherein Txindicates the crystallization temperature and Tgindicates the glass transition temperature. The magnetic core precursor is produced mixing the glassy alloy powder with the insulating material, compacting the mixture to form a magnetic core precursor, and annealing the magnetic core precursor at a temperature in the range between (Tg−170) K and TgK to relieve the internal stress of the magnetic core precursor. The glassy alloy exhibits low coercive force and low core loss.
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Ikarashi Kazuaki
Kenmotsu Hidetaka
Mizushima Takao
Naito Yutaka
Yoshida Shoji
Alps Electric Co. ,Ltd.
Brinks Hofer Gilson & Lione
Sheehan John P.
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