Soft magnetic powder, granulated powder, dust core, electromagnetic component, and method for producing dust core

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United States of America Patent

PATENT NO 8797137
APP PUB NO 20120229245A1
SERIAL NO

13505003

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Provided is a soft magnetic powder used for obtaining a dust core having a low hysteresis loss, in particular, in a high temperature range. A soft magnetic powder includes an aggregate of composite magnetic particles, each including a soft magnetic particle containing Fe, Si, and Al, and an insulating coating film disposed on the surface thereof, and satisfies the expressions (1) and (2) below: Expression (1) . . . 27≦2.5a+b≦29 and Expression (2) . . . 6≦b≦9, where a represents the Si content (mass %) and b represents the Al content (mass %). The soft magnetic powder is capable of reducing the hysteresis loss, in a high-temperature environment, of a dust core obtained using the soft magnetic powder.

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Patent Owner(s)

  • SUMITOMO ELECTRIC INDUSTRIES, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Maeda, Toru Itami, JP 136 1829
Watanabe, Asako Itami, JP 25 159

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