Method for producing composite soft magnetic material having high strength and high specific resistance

A method for producing a composite soft magnetic material having a high strength and a high specific resistance, which comprises providing a raw material mixture powder having a compounding composition comprising 0.05 to 1 mass % of a polyimide resin powder having an average particle diameter of 1 t...

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Bibliographic Details
Main Author MIYAHARA MASAHISA,MORIMOTO KOICHIRO
Format Patent
LanguageEnglish
Published 06.12.2006
Subjects
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRICITY
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
WORKING METALLIC POWDER
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Summary:A method for producing a composite soft magnetic material having a high strength and a high specific resistance, which comprises providing a raw material mixture powder having a compounding composition comprising 0.05 to 1 mass % of a polyimide resin powder having an average particle diameter of 1 to 100 mum, 0.002 to 0.1 mass % of a fine amide-based wax powder having an average particle diameter of 1 to 20 mum and the balanced amount of a soft magnetic powder coated with an insulating coating film having a soft magnetic powder and, formed on the surface thereof, an insulating coating film, heating the raw material mixture powder to a temperature of 60 to 110 DEG C, filling a mold heated to a temperature of 100 to150 DEG C with the heated raw material mixture powder, subjecting the raw material mixture powder to a green powder molding under a molding pressure of 700 to 1200 MPa, and firing the resulting molded article at a temperature of 225 to 300 DEG C.
Bibliography:Application Number: CN200480031924