Soft magnetic material comprising an insulating layer containing aluminum, silicon, phosphorous and oxygen; dust magnetic core; process for producing soft magnetic material; and process for producing dust magnetic core
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United States of America Patent
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Apr 10, 2012
Grant Date -
Feb 19, 2009
app pub date -
Nov 22, 2006
filing date -
Jan 4, 2006
priority date (Note) -
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Abstract
The soft magnetic material includes a plurality of composite magnetic particles having a metal magnetic particle and an insulating film surrounding the surface of the metal magnetic particle. The metal magnetic particle contains iron as the main component. The insulating film contains aluminum, silicon, phosphorus, and oxygen. The insulating film satisfies the relationship 0.4≦MAl/(MAl+MSi)≦0.9 and the relationship of 0.25≦(MAl+MSi)/MP≦1.0 in the case that molar amount of aluminum contained in the insulating film is represented by MAl, the sum of the molar amount of aluminum contained in the insulating film and the molar amount of silicon contained in the insulating film is represented by (MAl+MSi), and the molar amount of phosphorus contained in the insulating film is represented by MP.
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