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http://dx.doi.org/10.3740/MRSK.2006.16.6.355

Ultrasonic Synthesis of Silica Powder Using Emulsion Method  

Lee, S.G. (School of Materials Science and Engineering, Pusan National University)
Kim, H.S. (School of Materials Science and Engineering, Pusan National University)
Kang, B.S. (ERC/NSDM, Pusan National University)
Seo, G.S. (JPS Microtech, Pukyong National University)
Park, S.S. (Division of Applied Chemical Engineering, Pukyong National University)
Park, H.C. (School of Materials Science and Engineering, Pusan National University)
Publication Information
Korean Journal of Materials Research / v.16, no.6, 2006 , pp. 355-359 More about this Journal
Abstract
Fine silica powders were synthesized via w/o emulsion method using sodium silicate, ammonium sulfate, Triton N-57, and cyclohexane as silica source, precipitating agent, surfactant, and oil phase, respectively. The powders were prepared under a conventional process and an ultrasonic process using the same reactants at room temperature for 1 hr varying the concentration of $Na_2SiO_3$ solution and the mol ratio of $H_2O$/surfactant, respectively. The particle size of the silica powder was reduced with decreasing the concentration of sodium silicate solution and with increasing the mol ratio of $H_2O$/surfactant under with and without ultrasounds. The size of powder with ultrasounds was smaller than that without ultrasounds, which indicates that the application of ultrasound in the synthesis of silica powder is an efficient way to reduce particle size.
Keywords
silica; powder; ultrasound; emulsion;
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