摘要采用化学沉淀法在常温下以硅酸钠为原料，无水乙醇为分散剂，十六烷基三

Abstract: <br>At normal temperature, using chemical precipitation method, sodium silicate is used as raw material, absolute ethanol is used as dispersant, cetyltrimethylammonium bromide is used as surfactant, ethyl acetate is used as acidifier, and ammonium chloride is used as precipitant Preparation of ultra-fine silica powder, this article describes the various physical and chemical properties of silica powder and various applications in our daily life; mainly studied the concentration of sodium silicate, reaction temperature, mass fraction of dispersant, pH, etc. The influence of factors on the particle size of SiO2 micropowder and the preparation of ultrafine silica are characterized by a laser particle size analyzer to obtain the best reaction conditions.

Summary<br>Chemical precipitation method at room temperature to sodium silicate as raw material, no aqueous ethanol as dispersant, thabase trimethyl bromide ammonium as a surfactant, ethyl acetate as an acidifier, ammonium chloride for the preparation of ultrafine silica micro-powder for precipitation agent This paper expounds the physical and chemical properties of silica powder shimimumand and the various applications in our daily life, and mainly studies the effects of sodium silicate concentration, reaction temperature, mass fraction of dispersant, pH and other factors on SiO2 micropowder particle size and the factors of preparing ultrafine silica. The particle size is characterized by a laser particle size analyzer to obtain the best reaction conditions.

abstract<br>In this paper, the physical and chemical properties of silica powder and its application in our daily life are described. The concentration of sodium silicate is mainly studied The effects of reaction temperature, mass fraction of dispersant, pH and other factors on the particle size of SiO2 powder and the preparation of ultrafine SiO2 were studied by laser particle size analyzer.