Paper Title:
Preparation of Submicron Silica Powders from Sodium Silicate Using Ultrasonic Energy
  Abstract

Submicron silica powders were prepared by w/o emulsion method using inexpensive sodium silicate, ammonium sulfate and Triton N-57 as SiO2 source, precipitant and emulsifier, respectively. Nano-sized silica powders with narrow size distribution were prepared at a low temperature of 25°C for 1h by ultrasonic irradiation of the reactants using a commercial ultrasonic cleaner operating at a frequency of 47kHz, whereas silica powders with larger size and broad size distribution were synthesized using the same reactants at the same temperature and for the same time by the conventional process without ultrasounds. The particle size and size distribution of the silica powders obtained by the ultrasonic process were smaller and narrower than those by the conventional process, indicating that the application of ultrasound in the synthesis of silica powders by the w/o emulsion method is an efficient way to have powders with smaller and narrower particle size distribution.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
920-923
DOI
10.4028/www.scientific.net/KEM.336-338.920
Citation
S. G. Lee, Y. S. Jang, S. S. Park, B. Y. Moon, B. S. Kang, H. C. Park, "Preparation of Submicron Silica Powders from Sodium Silicate Using Ultrasonic Energy", Key Engineering Materials, Vols. 336-338, pp. 920-923, 2007
Online since
April 2007
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Price
$32.00
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