Method for preparing nickel nanopowders and method for making nickel nanopowders into paste

A method for making a nickel nanopowder into a paste, the method comprising:

• (a) a step of preparing a nickel oxide configured in the form of an oxide;
• (b) a nickel oxide nanopowder preparation step of pulverizing the nickel oxide to prepare a nano-sized nickel oxide nanopowder;
• (c) a step of drying the nickel oxide nanopowder;
• (d) a step of preparing the nickel oxide nanopowder into a natural metal nickel nanopowder by a reduction process in a hydrogen atmosphere and heat-treating the nickel oxide nanopowder at the same time to prepare the natural metal nickel nanopowder;
• (e) a step of simultaneously performing a step of crushing the natural metal nickel nanopowder produced by the heat-treatment process and a nanopowder oxidation preventing coating step of forming an oxidation preventing film on the crushed natural metal nickel nanopowder with an additive;
• and
• (f) a step of making the natural metal nickel nanopowder which has been formed by simultaneously performing the crushing step and the coating step into the paste.