A method of preparing a bismuth silicate powder

Present invention provides a method of preparing a bismuth silicate powders, comprising the steps of: Weigh a bismuth salt, sodium silicate, a reducing agent, a bismuth salt, sodium silicate, the molar ratio of the reducing agent is 1 ~ 12: 1 ~ 2: 10 ~ 30; the sodium silicate solution obtained was dissolved in deionized water, the concentration of the sodium silicate solution is between 0.5 ~ 2mol / L; the reducing agent is completely dissolved in deionized water, to obtain a reducing agent solution; after the bismuth salt was completely dissolved in deionized water or nitric acid solution, and then poured into a sodium silicate solution and reducing agent solution, followed by heating to 80 ~ 100 ℃ with a magnetic stirrer, stirring was continued, the solution was into high temperature sintering furnace preheated to 600 ~ 800 ℃, the evaporation of water, intense burning to give fluffy foam. The present invention is relatively inexpensive cost of using sodium silicate as a raw material, facilitate practical application; prepared powder well dispersed small particles; simple equipment, process.