Coarse silver powder, ultra-fine silver powder, flake silver powder, reduced silver powder, silver powder for electronic industry, wholesale direct supply

Silver powder, due to its silver white metallic luster, is commonly known as aluminum silver powder or silver powder. Its chemical composition is actually "aluminum", not "silver". Application scope: Powder coatings, inks, plastic masterbatch, printing, imitation gold paper, imitation gold card, gold film, textiles, but it will oxidize and turn black when used in water-based paints and paints with acid and alkali.

Silver powder is classified according to particle size, with an average particle size of less than 0.1 μ m (100nm) classified as nano silver powder; 0.1 μ m<Dav (average particle size)<10.0 μ m is silver micro powder; Dav (average particle size)>10.0 μ m is considered coarse silver powder. There are many methods for preparing powders. For silver, physical methods (plasma, atomization) and chemical methods (silver nitrate thermal decomposition, liquid-phase reduction) can be used in one go. Due to silver being a precious metal that is easily reduced back to its elemental state, liquid-phase reduction is currently the main method for preparing silver powder. Silver salts (such as silver nitrate) are dissolved in water, and chemical reducing agents (such as hydrazine hydrate) are added to deposit silver powder. After washing and drying, silver reducing powder is obtained with an average particle size between 0.1-10.0 μ m. The selection of reducing agents, control of reaction conditions, and use of interfacial active agents can prepare silver micro powders with different physical and chemical properties (particle morphology, dispersion degree, average particle size and particle size distribution, specific surface area, bulk density, tap density, grain size, crystallinity, etc.). The reduced powder can be mechanically processed (ball milled, etc.) to obtain polished silver powder and silver flake.