沈殿法による銀粉の粒子径制御について

抄録

In an attempt to establish a method for controlling the particle size of fine silver powders for the experimental use of thick-film materials, particle size and their distribution characteristics of silver powders prepared by chemical deposition from AgNO₃ solution with NaOH and HCHO solutions were studied with correlation to the reaction conditions. The effect of batch size on the precipitation reactions and the influence of gelatine, added to both AgNO₃ and NaOH solutions, on the particle shape and size of the silver powders were also studied using an electron microscope. A new method named “drop-to-drop method” for the preparation of the silver powders consisting of spherical particles the sizes of which can be regulated within the range from 0.1μm to 0.02μm with gelatine has been developed. The mean particle size deviation of the silver powders thus obtained was found to be 22.5%.