Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Dry Synthesis of Nearly Monodisperse Spherical Silica

단분산에 가까운 구형 실리카의 건식 제조

  • Received : 2007.06.07
  • Accepted : 2007.07.27
  • Published : 2007.12.31
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Abstract

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 $SiCl_4$ vapor. In the first stage, the $SiCl_4$ was partially hydrolyzed in a batch reactor at $150^{\circ}C$ 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.

$SiCl_4$ 증기를 수증기에 의해 처음으로 2단계 가수분해시키는 방식에 의해 200~300 nm 크기의 단분산에 가까운 구형 실리카 분말을 건식으로 제조하였다. 1단계로 회분식 반응기를 사용하여 $150^{\circ}C$ 정도의 저온에서 부분 가수분해에 의해 단분산에 가까운 silicon oxychloride 구형 입자를 형성시킨 후 2단계로 관형반응기를 사용하여 $1,000^{\circ}C$에서 가수분해 반응을 완료시킴으로써 1단계 이후의 입자 형상이 거의 그대로 보존된 실리카 분말을 제조하였다.

Keywords

Acknowledgement

Supported by : 공주대학교

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