A process for the production of metal powders with grains in the nanoscale and an outstanding high-frequency characteristics and method for making a high frequency - soft magnet core with the use of such powders

摘要

An amorphous soft magnetic core having an excellent high-frequency characteristic is manufactured by: performing a thermal treatment of iron-based amorphous metal ribbons produced by using a rapid solidification process to then be converted into nano-scale grain metal ribbons; and crushing the nano-scale grain metal ribbons to obtain nano-scale grain metal powders. Manufacture of an amorphous soft magnetic core having an excellent high-frequency characteristic comprises: performing a thermal treatment of iron-based amorphous metal ribbons produced by using a rapid solidification process (RSP) to then be converted into nano-scale grain metal ribbons; crushing the nano-scale grain metal ribbons to obtain nano-scale grain metal powders; classifying the nano-scale grain metal powders to then be mixed into a distribution of powder particles, having an optimal uniform composition; mixing the mixed nano-scale grain metal powders with a binder, and forming a core; and annealing the formed core to then coat the core with an insulating resin.