The invention relates to silver micro
powder and a preparation method and application thereof, and relates to the technical field of functional materials. The preparation method comprises the following steps: preparing a
silver nitrate solution at a temperature of 10-20 DEG C, a dispersant solution at a temperature of 30-60 DEG C, a morphology
regulator solution at a temperature of 25-35 DEG C, a pH
regulator solution at a temperature of 30-60 DEG C and a
reducing agent solution at a temperature of 55-65 DEG C; adding the pH
regulator solution into the
silver nitrate solution, performing stirring, adding the morphology regulator solution, the
reducing agent solution and the dispersing agent solution, performing mixing, adjusting the temperature to 30-60 DEG C, and performing reaction for 30-90 minutes; performing cleaning until the electric
conductivity of the reacted product is less than 50 [mu]s / cm, and performing
settling and separating; and adding a surface treating agent, performing
drying, powdering and sieving to obtain a product. The
mass of a morphology regulator is 0.1-0.5% of the
mass of the silver micro
powder, and the morphology regulator comprises at least one of
silver chloride,
silver bromide and
silver iodide. The preparation method is simple and easy to implement and high in production efficiency.