Magnetic core and method of producing the same
First Claim
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1. A magnetic core, which comprises a compression molded product comprising:
- a soft magnetic material selected from an iron powder, an iron alloy magnetic powder, and combinations thereof, said material having a mean particle size of 10 to 100 μ
m; and
1.5 to 40%, as a total amount in terms of volume ratio, of insulating binder resin and a non-ferrite insulating inorganic compound powder.
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Abstract
Disclosed is an magnetic core comprising a molded product made of an iron powder and/or an iron alloy magnetic powder having a mean particle size of 10 to 100 μm, and 1.5 to 40%, as a total amount in terms of volume ratio, of an insulating binder resin and an insulating inorganic compound powder. Also disclosed is a useful method of producing the magnetic core.
81 Citations
11 Claims
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1. A magnetic core, which comprises a compression molded product comprising:
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a soft magnetic material selected from an iron powder, an iron alloy magnetic powder, and combinations thereof, said material having a mean particle size of 10 to 100 μ
m; and1.5 to 40%, as a total amount in terms of volume ratio, of insulating binder resin and a non-ferrite insulating inorganic compound powder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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- 10. A method of producing an magnetic core, which comprises a step of preparing a binder by mixing an insulating inorganic compound powder with a resin, a step of grinding said binder into a powder to prepare a powdery binder, and a step of mixing and compression molding said powdery binder with iron powder, iron alloy magnetic powder or a mixture thereof.
Specification