Method for preparing active silver powder by utilizing induction of silver sulfide, and silver powder prepared by method

The invention discloses a method for preparing active silver powder by utilizing the induction of silver sulfide. The method comprises the steps of (1) dissolving a dispersing agent into deionized water, then adding an oxidizing agent, and obtaining an oxidizing agent solution; (2) adding the dispersing agent into a reducing agent, and obtaining a reducing agent solution; and preparing to obtain aNa2S control agent solution; (3) quickly adding the Na2S control agent solution into the oxidizing agent solution, stirring for reaction for several minutes, then utilizing a peristaltic pump or a metering pump for dropwise adding the obtained reducing agent solution into the oxidizing agent solution, and carrying out a reducing reaction; and (4) adding a flocculating agent for quickly precipitating the silver powder, carrying out solid-liquid separation, and drying to obtain near spherical silver powder; and enabling an Na2S solution and silver ions to form Ag2S, and utilizing the Ag2S as anucleating agent and a con