Invention Grant
- Patent Title: Soft magnetic powdered core and method for producing same
- Patent Title (中): 软磁粉芯及其制造方法
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Application No.: US13384995Application Date: 2010-07-08
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Publication No.: US08398879B2Publication Date: 2013-03-19
- Inventor: Kohei Muramatsu , Chio Ishihara , Masaki Yanaka
- Applicant: Kohei Muramatsu , Chio Ishihara , Masaki Yanaka
- Applicant Address: JP Chiba
- Assignee: Hitachi Powdered Metals Co., Ltd.
- Current Assignee: Hitachi Powdered Metals Co., Ltd.
- Current Assignee Address: JP Chiba
- Agency: Nath, Goldberg & Meyer
- Agent Jerald L. Meyer; Sanjana Mangalagiri
- Priority: JPP2009-171879 20090723
- International Application: PCT/JP2010/061615 WO 20100708
- International Announcement: WO2011/010561 WO 20110127
- Main IPC: H01F1/24
- IPC: H01F1/24
Abstract:
A powder mixture, which contains a soft magnetic powder and an insulating powder lubricant in an amount of 0.1% by mass or more relative to the soft magnetic powder, is formed by compacting at a compacting pressure of 800 MPa or less, thereby obtaining a powder compact that has a space factor of the soft magnetic powder of 93% or more. The powder compact can be used as a soft magnetic powdered core. The soft magnetic powdered core has a specific resistance or 10,000 μΩcm or more. A powder of a metal soap such as barium stearate or lithium stearate is used as the insulating powder lubricant.
Public/Granted literature
- US20120119134A1 SOFT MAGNETIC POWDERED CORE AND METHOD FOR PRODUCING SAME Public/Granted day:2012-05-17
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