Preparation of the Silica Micro-Spheres by Chemical Precipitation Process

Abstract:

Silica micro-spheres were prepared from sodium silicate at room temperature with ethyl acetate as the precipitant. The effect of process parameters on the yield and the morphology of SiO₂ powders was systematically investigated and the optimum reaction condition was confirmed as follows: the concentration of sodium silicate was 0.6 mol/L, the total addition amount of the blend surfactants of PEG-1000 and sodium dodecyl benzene sulfonate (SDBS) was 2.1% and the blend ratio was 20:1, the addition amount of ethanol and ethyl acetate were 5.0% and 8.0%, respectively, the stirring rate was 600 rpm and the reaction time was 4.0 hours. The average particle size was 400 nm and the yield was 93.8% .The product was characterized by scanning electron microscope, Infrared Spectroscopy, and X-ray powder diffraction.

• Periodical: Advanced Materials Research (Volumes 602-604)
• Pages: 259-264
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.602-604.259
• Online since: December 2012
• Authors: Bin Wen, Chun Qing Huo, Cong Hao Li, Long Zhang
• Keywords: Blend Surfactant, Morpholoy, Precipitation, Silica Micro-Sphere, Yield

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