Magnetic powder material, low-loss composite magnetic material containing same, and magnetic element using same

摘要

The present invention provides a material which can be used for low pressure molding, and which has a low core loss while maintaining the characteristic of an amorphous powder that is the high coercive force. It provides a magnetic powder material containing, relative to the weight thereof, amorphous powders of 45 to 80 wt %, crystalline powders of 55 to 20 wt %, and a bonding agent. The magnetic powder material contains, relative to the mass thereof, Si of 4.605 to 6.60 mass %, Cr of 2.64 to 3.80 mass %, C of 0.225 to 0.806 mass %, Mn of 0.018 to 0.432 mass %, B of 0.99 to 2.24 mass %, P of equal to or less than 0.0248 mass %, S of equal to or less than 0.0165 mass %, Co of equal to or less than 0.0165 mass %, and a balance of Fe and inevitable impurities.

主权项

1. A magnetic powder material comprising, relative to a weight of the magnetic powder material, amorphous powders in an amount from 45 to 80 wt % and crystalline powders in an amount from 55 to 20 wt %,
wherein the amorphous powders comprise, relative to the mass of the magnetic powder material: Si of not less than 6.2 mass % but not more than 7.2 mass %; Cr of not less than 2.3 mass % but not more than 2.7 mass %; C of not less than 0.5 mass % but not more than 1.0 mass %; Mn of not less than 0.04 mass % but not more than 0.49 mass %; B of not less than 2.2 mass % but not more than 2.8 mass %; and a balance of Fe and inevitable impurities, and the crystalline powders comprise, relative to the mass of the magnetic powder material: Si of not less than 3.3 mass % but not more than 4.2 mass %; Cr of not less than 4.0 mass % but not more than 4.7 mass %; C of equal to or less than 0.03 mass %; Mn of equal to or less than 0.20 mass %; P of equal to or less than 0.045 mass %; S of equal to or less than 0.03 mass %, Co of equal to or less than 0.03 mass %; and a balance of Fe and inevitable impurities.