Method for Producing Soft Magnetic Metal Powder Coated With Mg-Containing Oxide Film and Method for Producing Composite Soft Magnetic Material Using Said Powder
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United States of America Patent
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Issued Date -
Jan 3, 2008
app pub date -
Sep 6, 2005
filing date -
Sep 6, 2004
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Abandoned
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Abstract
A method for producing a soft magnetic metal powder coated with a Mg-containing oxide film, comprising the steps of adding and mixing a Mg powder with a soft magnetic metal powder which has been subjected to heating treatment in an oxidizing atmosphere at a temperature of 40 to 500.degree. C. to obtain a mixed powder, and heating the mixed powder at a temperature of 150 to 1,100.degree. C. in an inert gas or vacuum atmosphere under a pressure of 1.times.10.sup.-12 to 1.times.10.sup.-1 MPa, while optionally tumbling; and a method for producing a composite soft magnetic material from the soft magnetic metal powder coated with a Mg-containing oxide film.
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