Silver powder
AssigneeDowa Mining Co., Ltd.
InventorsHiroshi Matsushima, Kozo Ogi
Life of this patent
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AssigneeDowa Mining Co., Ltd.
InventorsHiroshi Matsushima, Kozo Ogi
Estimating the term…
There is provided a method for producing a silver powder having excellent dispersibility and capable of forming a paste which do not form suspended matters by phase separation and which is printed on a substrate to form a film having a uniform thickness. In this method, an alkali or a complexing agent is added to an aqueous silver salt containing solution to form a silver oxide containing slurry or an aqueous silver complex salt containing solution. After or before silver particles are deposited by reduction by adding a reducing agent to the silver oxide containing slurry or aqueous silver complex salt containing solution while stirring it, at least one chelating agent selected from the group consisting of compounds having an azole structure, dicarboxylic acids, hydroxy carboxylic acids and salts thereof is added to a silver power containing slurry solution as a dispersing agent.
A silver powder having a tap density of 2 g/cm3 or more, a mean particle diameter of 0.1 to 5 μm which is measured by a laser diffraction method, a specific surface area of 5 m2/g or less, and an angle of repose of 50° or less.
Dependencies are inferred from the claim text.