Preparation method of flake silver powder

Abstract

The invention provides a preparation method of flake silver powder. The method comprises the steps that water, silver salt, a complexing agent, a silver-plated brightener, a dispersing agent, sublimated flake compound crystals and a reducing agent are adopted as raw materials, a chemical plating method is adopted, silver is plated on the surface of the sublimated flake compound crystal until silver ions react completely, and after the reaction is finished, the flake silver powder is directly obtained through separation and purification and processing treatment processes without ball milling. The preparation method has a series of advantages of being low in energy consumption, small in environmental pollution, simple in production process, short in process route, low in the large-scale production equipment investment, high in production efficiency, lower in production cost, good in product dispersion performance, good in product conductivity and the like, the method is suitable for large-scale production, the problems existing in the process of preparing the sheet-like silver powder by a ball milling method are solved, and the method has the good industrialization prospects.

Description

technical field [0001] The invention relates to a preparation method of flake silver powder, which belongs to the technical field of preparation of metal powder materials. Background technique [0002] Metal powders are divided into four types according to particle shape: spherical, random particle, flake and wire. Different from spherical metal powder and granular metal powder, flake metal powder has excellent catalytic performance, excellent sintering performance, excellent thixotropic performance, excellent adhesion, good shielding effect, excellent electromagnetic wave reflection ability and excellent Excellent electrical conductivity makes it widely used in chemical catalysis, powder metallurgy, conductive coatings, conductive adhesives, conductive inks and conductive pastes. [0003] At present, spherical metal powders or granular metal powders are mostly used in the fields of chemical catalysis, electromagnetic shielding coatings, radar wave reflecting coatings, cond...

AI Technical Summary

Problems solved by technology

So far, this method has not been reported in the literature

Images