Magnetic core and method of producing the same
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsHiromichi Horie, Mikio Morita, Itsuo Arima
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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 .mu.m, 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.
Claims11
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 .mu.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.
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.
Dependencies are inferred from the claim text.