Invention Grant
- Patent Title: Soft magnetic material, powder magnetic core and method of manufacturing soft magnetic material
- Patent Title (中): 软磁材料，粉末磁芯和软磁材料的制造方法
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Application No.: US11629976Application Date: 2005-09-29
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Publication No.: US07767034B2Publication Date: 2010-08-03
- Inventor: Toru Maeda , Naoto Igarashi , Haruhisa Toyoda , Hirokazu Kugai , Kazuyuki Hayashi , Hiroko Morii , Seiji Ishitani
- Applicant: Toru Maeda , Naoto Igarashi , Haruhisa Toyoda , Hirokazu Kugai , Kazuyuki Hayashi , Hiroko Morii , Seiji Ishitani
- Applicant Address: JP Osaka JP Hiroshima
- Assignee: Sumitomo Electric Industries, Ltd.,Toda Kogyo Corp.
- Current Assignee: Sumitomo Electric Industries, Ltd.,Toda Kogyo Corp.
- Current Assignee Address: JP Osaka JP Hiroshima
- Agency: McDermott Will & Emery LLP
- Priority: JP2004-286164 20040930
- International Application: PCT/JP2005/018035 WO 20050929
- International Announcement: WO2006/035911 WO 20060406
- Main IPC: H01F1/20
- IPC: H01F1/20 ; H01F1/24 ; B32B5/00
Abstract:
A soft magnetic material is a soft magnetic material including a composite magnetic particle (30) having a metal magnetic particle (10) mainly composed of Fe and an insulating coating (20) covering metal magnetic particle (10), and insulating coating (20) contains an iron phosphate compound and an aluminum phosphate compound. The atomic ratio of Fe contained in a contact surface of insulating coating (20) in contact with metal magnetic particle (10) is larger than the atomic ratio of Fe contained in the surface of insulating coating (20). The atomic ratio of Al contained in the contact surface of insulating coating (20) in contact with metal magnetic particle (10) is smaller than the atomic ratio of Al contained in the surface of insulating coating (20). Thus, iron loss can be reduced.
Public/Granted literature
- US20070235109A1 Soft Magnetic Material, Powder Magnetic Core and Method of Manufacturing Soft Magnetic Material Public/Granted day:2007-10-11
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