| abstract |
The invention discloses a preparation method of high-vibration and high-specification ultrafine silver powder. The invention adopts the co-current addition of a shape modifier solution and a metal salt solution into a reaction bottom liquid, and controls the temperature of the reaction system to prepare the reduced powder. The silver powder is obtained. Narrow particle size distribution, good dispersibility, high tap density, and high specific surface area, with an average particle size of 1.0-3.0μm, a specific surface area of 0.6-0.8m 2 /g, and a tap density of 4.0-5.5g/cm 3 High-vibration high-ratio table superfine silver powder. The selection of reducing agent is the key to control the uniform and concentrated particle size, and the purpose of obtaining silver powder products with narrow particle size distribution and good dispersibility can be achieved by better controlling the nucleation and growth rate of silver powder during preparation; The choice is to control the crystalline properties and appearance of silver powder to achieve the purpose of obtaining silver powder products with high specific surface area. The dispersant ensures that the prepared silver powder has no residue of the dispersant after washing and drying; the dispersibility and tap density of the synthetic silver powder are improved by the surfactant. |