| 摘要 |
PROBLEM TO BE SOLVED: 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. SOLUTION: 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. COPYRIGHT: (C)2011,JPO&INPIT
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