METHOD OF MANUFACTURING SILVER POWDER BY CHEMICAL REDUCTION

摘要

The invention of the type flakes (flake) using a chemical reduction method and a sphere is related to a method for producing the powder.; According to the present invention, a reducing agent solution as hydroquinone, ammonium sulfite (or sulfite, potassium) using a dissolving solution, and this solution then a solution of a silver nitrate solution, by reaction with stirring weakly 20-5 seconds was added to the aqueous ammonia only in the dissolving hydroquinone ammonium sulfite (or sulfite, potassium) in the first method, a reducing agent for the dispersed flakes type prepare a powder and a solution made by adding the gelatin to the dispersing agent, and the silver nitrate and ammonia dissolved in the solution, the solution by rapid mixing for only dispersed spherical it is provided a second method for producing the powder.; According to the present invention, while using the same solution of the easily spherical or flake-shaped as chemical reduction method is make the powder and, moreover, can be obtained for the dispersion is a powder particle size distribution is only narrowing of the powder obtained. According to the present invention , it is possible to simply the manufacturing process of the powders, and the production is very good powder in terms of efficiency, productivity, and production is possible at room temperature.