Method for manufacturing Fe-based amorphous metal powder and method for manufacturing amorphous soft magnetic cores using same

A method for manufacturing an amorphous soft magnetic core, comprising:

• preparing a composite powder;
• adding a binder to the composite powder and molding the composite powder and the binder to obtain a molded core material;
• and
• annealing the molded core material,
• wherein the preparing consists of:
• preparing a Fe-based amorphous metallic ribbon;
• pulverizing the amorphous metallic ribbon to obtain an amorphous metallic powder;
• size-sorting the amorphous metallic powder to obtain size-sorted amorphous metallic powders;
• and
• mixing, among the size-sorted amorphous metallic powders, a size-sorted amorphous metallic powder having a particle size of 5 to 100 μm to obtain the composite powder, wherein the composite powder consists of:
• 40 to 85 wt. % of powder having a particle size of 75 to 100 μm, 10 to 50 wt. % of powder having a particle size of 50 to 75 μm, and 5 to 20 wt. % of powder having a particle size of 5 to 50 μm.