Patent ID: 9061353
Filing Date: 2015-06-23
Classification: B22F,C23C

Abstract:
1. A method of manufacturing a high purity spherical copper (Cu) powder through plasma, which uses an apparatus composed of a raw material feeder, a thermal plasma torch and a reactor to prepare a metal powder, wherein the plasma is a thermal plasma generated from a gas that includes argon with 5 to 50% by volume of hydrogen added, and the reactor is formed to have a length of 1.4 to 2.5 meters (m), comprising the steps of: passing a Cu powder having an average particle diameter of 30 to 450 μm through the thermal plasma torch and the reactor at an introduction rate of 2 to 30 kg/hr, to thereby fabricate a Cu powder having an average particle diameter of 5 to 300 μm, wherein the Cu powder having the average particle diameter of 30 to 450 μm has a purity of 95 to 99%, and the purity of the Cu powder having the average particle diameter of 5 to 300 μm is 4N grade (99.99%) or more.