Journal of Northeastern University ›› 2008, Vol. 29 ›› Issue (5): 705-708.DOI: -

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Ultrasonic preparation of ultrafine silica and analysis of influencing factors

Shen, Xiao-Yi (1); Liu, Yan (1); Zhai, Yu-Chun (1); Gu, Hui-Min (1)   

  1. (1) School of materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-05-15 Published:2013-06-22
  • Contact: Shen, X.-Y.
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Abstract: The ultrafine silica powder was prepared ultrasonically using sol-gel method in 2-propanol-H2O-NH3 system, where the ammonia acts as the catalyst during reaction. The ultrafine silica powder sample was characterized by SEM, XRD and IR, and the results indicated that the SiO2 particles thus prepared are amorphous in regularly spheric shape with uniform size and contain lots of hydroxides. The influences of ultrasonic power, reaction temperature, mole mixture ratio of reactants and concentration of ammonia solution on sample's morphology and particle size were studied through some single-factor experiments, and the results revealed that the ultrasonic power affects particle size greatest with the mole mixture ratio of reactants as the next. Besides them, the influence of the concentration of ammonia solution is also considerable.

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