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AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsTakashi Mukuno, Takayuki Araki, Yoshiharu Toshima
Estimating the term…
The nickel powder is characterized in that the rate of the nickel particles whose particle size is not less than 1.2 time the average particle size as determined by the observation with an SEM is not more than 5% of the total number of nickel particles and that the rate of nickel particles whose particle size is not more than 0.8 time the average particle size is not more than 5% of the total number of nickel particles. The nickel powder is produced by bringing a slurry, containing nickel hydroxide, which is prepared by adding an aqueous solution of a nickel salt to an aqueous solution of an alkali metal hydroxide, into contact with a hydrazine reducing agent under the temperature conditions of not less than 55° C. to reduce the nickel hydroxide.
A method for the production of nickel powder comprising the step of bringing a slurry, containing nickel hydroxide, which is prepared by adding an aqueous nickel salt solution containing a nickel complex to an aqueous solution of an alkali metal hydroxide, into contact with a hydrazine reducing agent under the temperature conditions of not less than 55° C. to reduce the nickel hydroxide.
Dependencies are inferred from the claim text.