Patent ID: 9744594
Date: 2017-08-29
CPC Classifications: B22F,C22B

Claim:
1. A method for producing nickel microparticle, wherein the method uses at least two fluids to be processed, of these, at least one fluid to be processed is a nickel compound fluid in which a nickel compound is dissolved in a solvent, the nickel compound fluid contains a sulfate ion, at least one fluid to be processed other than the foregoing fluid to be processed is a reducing agent fluid in which a reducing agent is dissolved in a solvent, at least any one fluid to be processed of the nickel compound fluid and the reducing agent fluid contains a polyol, these fluids to be processed are mixed to form a thin film fluid between at least two processing surfaces which are disposed in a position they are faced with each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other, whereby the nickel microparticle is separated, controlling a pH of the nickel compound fluid which is introduced into between the at least two processing surfaces and also a molar ratio of the sulfate ion relative to the nickel contained in the nickel compound fluid such that the nickel microparticle has a crystallite diameter (d) of 30 nm or more, and a ratio of d/D of 0.30 or more, wherein D is a particle diameter of the nickel microparticle.