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Received June 7, 2007
Accepted July 27, 2007
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단분산에 가까운 구형 실리카의 건식 제조
Dry Synthesis of Nearly Monodisperse Spherical Silica
공주대학교 화학공학부, 314-701 충남 공주시 신관동 182
Department of Chemical Engineering, Kongju National University, 182 Shinkwan-dong, Kongju, Chungnam 314-701, Korea
Korean Chemical Engineering Research, December 2007, 45(6), 677-679(3), NONE Epub 26 December 2007
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Abstract
SiCl4 증기를 수증기에 의해 처음으로 2단계 가수분해시키는 방식에 의해 200~300 nm 크기의 단분산에 가까운 구형 실리카 분말을 건식으로 제조하였다. 1단계로 회분식 반응기를 사용하여 150 ℃ 정도의 저온에서 부분 가수분해에 의해 단분산에 가까운 silicon oxychloride 구형 입자를 형성시킨 후 2단계로 관형반응기를 사용하여 1,000 ℃에서 가수분해 반응을 완료시킴으로써 1단계 이후의 입자 형상이 거의 그대로 보존된 실리카 분말을 제조하였다.
Nearly monodisperse spherical silica particles, 200~300 nm in diameter, were produced via a dry route for the first time through a two-stage hydrolysis of SiCl4 vapor. In the first stage, the SiCl4 was partially hydrolyzed in a batch reactor at 150 ℃ to form nearly monodisperse silicon oxychloride particles. In the second stage, the oxychlorides were hydrolyzed further in a tubular reactor to have produced silica with the morphology and size nearly conserved.
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References
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Ulrich GD, Combust. Sci. Technol., 4(1), 47 (1971)
Lee D, Choi M, J. Aerosol Sci., 31(10), 1145 (2000)
Park KY, Park HG, Kor. Patent(filed), 10-2007-0025441 (2007)
Park KY, Ullmann M, Suh YJ, Friedlander SK, J. Nanopart. Res., 3(4), 309 (2001)
Giesche H, J. European Ceram. Soc., 14(3), 189 (1994)
Brinker CJ, Scherer GW, Sol-Gel Science, Academic Press, Inc., NY (1990)
Ignatov SK, Sennikov PG, Razuvaev AG, Chuprov LA, Schrems O, Ault BS, J. Phys. Chem. A, 107(41), 8705 (2003)
