Soft magnetic powdered core and method for producing same
US8398879B2 · kind B2 · utility
1Cited by
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7Claims
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Key dates
| Filing date | Jul 8, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Jul 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.