POWDER MAGNETIC CORE AND PROCESS FOR PRODUCTION THEREOF

WIPO Patent Application WO/2011/126119

A1

A powder magnetic core comprises a metal powder and an insulating layer comprising a particulate metal oxide and formed between the particles of the metal powder, wherein the insulating layer contains Ca, P, O, Si and C as elements. Thus, disclosed are: a powder magnetic core having both reliable permanent magnetic permeability properties and reduced iron loss under high magnetic fields; and a process for producing the powder magnetic core.

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INAGAKI Takashi (2-1, Minoridai 5-chome, Matsudo-sh, Chiba 95, 〒2702295, JP)
稲垣　孝 (〒95 千葉県松戸市稔台五丁目２番地１　日立粉末冶金株式会社内 Chiba, 〒2702295, JP)
SHIMOYAMA Takehiro (48, Wadai, Tsukuba-sh, Ibaraki 47, 〒3004247, JP)
下山　雄大 (〒47 茨城県つくば市和台４８　日立化成工業株式会社内 Ibaraki, 〒3004247, JP)

JP2011/058936

October 13, 2011

April 08, 2011

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HITACHI CHEMICAL COMPANY, LTD. (1-1 Nishi-Shinjuku 2-chome, Shinjuku-ku Tokyo, 49, 〒1630449, JP)
日立化成工業株式会社 (〒49 東京都新宿区西新宿二丁目１番１号 Tokyo, 〒1630449, JP)
Hitachi Powdered Metals Co., Ltd. (2-1 Minoridai 5-chome, Matsudo-shi Chiba, 95, 〒2702295, JP)
日立粉末冶金株式会社 (〒95 千葉県松戸市稔台五丁目２番地１ Chiba, 〒2702295, JP)
INAGAKI Takashi (2-1, Minoridai 5-chome, Matsudo-sh, Chiba 95, 〒2702295, JP)
稲垣　孝 (〒95 千葉県松戸市稔台五丁目２番地１　日立粉末冶金株式会社内 Chiba, 〒2702295, JP)

B22F1/02; B22F1/00; B22F3/00; H01F1/24; H01F1/33; H01F3/08; H01F27/255; H01F41/02

HASEGAWA Yoshiki et al. (SOEI PATENT AND LAW FIRM, Marunouchi MY PLAZA 9th fl. 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)

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