Method for Producing Composite Soft Magnetic Material Having High Strength and High Specific Resistance
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United States of America Patent
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Issued Date -
Nov 22, 2007
app pub date -
Oct 28, 2004
filing date -
Oct 30, 2003
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Abandoned
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Abstract
The present invention relates to composite soft magnetic materials having high strength and high specific resistance and a method of producing such materials by: heating mixture powder having a composition containing 0.05-1 wt % of polyimide resin powder having an average particle diameter of 1 to 100 .mu.m, 0.002-0.1 wt % of fine amide-based wax powder having an average particle diameter of 1 to 20 .mu.m, and the balance composed of insulating film-coated soft magnetic powder obtained by forming an insulating film on the surface of soft magnetic powder, at a temperature of 60 to 110.degree. C.; filling the heated mixture powder in a mold which is heated at a temperature of 100 to 150.degree. C.; compacting the heated mixture powder at a molding pressure of 700 to 1200 MPa to obtain a compact; and curing the obtained compact at a temperature of 225 to 300 .degree. C.
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