LOW AGGREGATIVE SILVER POWDER AND ITS MANUFACTURING METHOD, AND CONDUCTIVE PASTE USING LOW AGGREGATIVE SILVER POWDER

摘要

PROBLEM TO BE SOLVED: To provide a silver powder which is a fine particle and possesses excellent dispersibility (low aggregativity) which a conventional silver powder does not possess, and at the same time possesses a large crystallite diameter.;SOLUTION: The silver powder is produced by a wet reduction process, and an average particle diameter D₅₀ by a laser diffraction scattering type particle size distribution measuring method is 0.1-3 μm, and a low aggregative silver powder characterized by a value of the degree of aggregation expressed with D₅₀/D_IA using the average particle diameter D₅₀ and the average particle diameter D_IA obtained by image analysis being 5.0 or less is used. Moreover, in order to acquire the low aggregative silver powder, slurry of silver chelate complex which used ethylenediamine tetraacetic acid salt as complexing agent is used as materials, and a manufacturing method using wet reduction process is adopted.;COPYRIGHT: (C)2004,JPO