Method for producing spherical nickel-based metal powder

A method for producing spherical nickel-based metal powder, comprising the steps of:

• providing a metal precursor including nickel precursor, a sulfur compound, and a metal compound for shell formation;
• introducing the metal precursor, the sulfur compound, and the metal compound for shell formation into a reactor;
• vaporizing the metal precursor, the sulfur compound, and the metal compound for shell formation;
• forming a powder-shell layer composite consisting of nickel-based metal powder containing sulfur and a shell layer surrounding the surface of the nickel-based metal powder through a reaction of the metal precursor, the sulfur compound, and the metal compound for shell formation with a reducing gas introduced into the reactor,
• subjecting the powder-shell layer composite to desulfurization heat treatment to reduce the sulfur content within the nickel-based metal powder;
• and
• obtaining the nickel-based metal powder by selectively removing the shell layer.

A method for producing spherical nickel-based metal powder, comprising the steps of:

• providing a metal precursor, which includes nickel precursor, and a sulfur compound;
• introducing the metal precursor and the sulfur compound into a reactor;
• vaporizing the metal precursor and the sulfur compound within the reactor;
• producing nickel-based metal powder containing sulfur through a reaction of the metal precursor and the sulfur compound with a reducing gas introduced into the reactor,
• preparing a slurry by dispersing the nickel-based metal powder in a solution containing a sintering inhibitor, followed by forming a powder-anti-sintering layer composite in which the sintering inhibitor surrounds the nickel-based metal powder through spray drying treatment using the slurry;
• subjecting the powder-anti-sintering layer composite to desulfurization heat treatment to reduce the sulfur content within the nickel-based metal powder, and
• obtaining the nickel-based metal powder by selectively removing the anti-sintering layer.