Effect of preparation parameters on morphology of silver powders by liquid phase reduction method
HUANG Can
YUAN Gecheng
DENG Nanlin
LU Xiaodong
XU Futai
Abstract：Effect of the concentration of AgNO3 and ascorbic acid,the temperature and pH of reaction system,the type and dosage of addition agent on the morphology of ultrafine silver powders by liquid phase reduction method were explored.Particles were characterized and analyzed with SEM,particle size analyzer,surface area analyzer and particle image analyzer.It shows that pH value is a significant factor affecting the particle size,morphology and dispersion simultaneously,while the dosage of addition agent and ascorbic acid concentration are significant factors affecting particle morphology and dispersion respectively.As the pH value gradually increased from 2 to 10,particles presented shape change by irregular polyhedron,rod-shaped to spherical,and average particle size gradually decrease.As the dosage of addition agent increase,particles present shape change by irregular to spherical,spiky ball,and the sphericity of particles is the greatest when the dosage was 2.5％.With increasing ascorbic acid concentration,the dispersion of particles become worse,and particles are at best dispersion when it is 0.5 mol/L.
Keywords：ultrafine silver powdersliquid reduction methodprocess parametersmorphology
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)