Soft magnetic powdered core and method for producing same
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United States of America Patent
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Mar 19, 2013
Grant Date -
May 17, 2012
app pub date -
Jul 8, 2010
filing date -
Jul 23, 2009
priority date (Note) -
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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.
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