AMORPHOUS COMPRESSED POWDER CORE HAVING HIGH PERMEABILITY BY BEING FORMED AT HIGH TEMPERATURE AND METHOD FOR MANUFACTURING SAME

摘要

In the present invention, according to an amorphous compressed powder core having high permeability and a method for manufacturing the same, powders are coated primarily with phosphoric acid and secondarily with polyimide-based as an insulation agent, and amorphous and nanocrystalline alloy compressed powder core are manufactured to have an effective permeability of 85 or more, a very low iron loss of 300 mW/cc or less, and high frequency properties by performing an automatic compressed formation at a temperature of 200-550°C using MoS_2 or graphite powders lubricating at a high temperature. Also, according to the present invention, provided is the economical amorphous (nanocrystalline) compressed powder core having a high forming density and no surface crack, having less frequency dependence by having good insulation between particles, having unchangeable effective permeability in a high frequency band, and being used as a magnetic material of an electron or electric device in the frequency band of several kHz to tens of MHz.;COPYRIGHT KIPO 2014