To provide a soft magnetic dust core which is made high in density, small in the magnetic field for producing the magnetic flux density of 1 tesla and core loss, and especially increased in core resistance, and has high performance, and to provide a manufacturing method thereof in which such a soft magnetic dust core can be easily manufactured inexpensively and which is superior in productivity and economical efficiency.
The manufacturing method of the soft magnetic dust core containing at least composite magnetic particles having metal magnetic powder and an insulating film formed on a surface of the metal magnetic powder, and a lubricant, includes the processes of: carrying out warm molding of a mixture containing at least the composite magnetic particles having the metal magnetic powder and the insulating film formed on the surface of the metal magnetic powder, and the lubricant having a melting point of 50 to 170°C; and heat-treating the molding obtained by the warm molding in an oxygen-containing atmosphere.
TOKORO SEIGO
| JP2002184616A | 2002-06-28 | |||
| JP2005079511A | 2005-03-24 | |||
| JP2005187918A | 2005-07-14 | |||
| JP2002146406A | 2002-05-22 | |||
| JP2004363226A | 2004-12-24 | |||
| JP2004197212A | 2004-07-15 | |||
| JP2002184616A | 2002-06-28 | |||
| JP2005079511A | 2005-03-24 |
Toshifumi Onuki
Takuji Fukasawa