Preparation of SiO2/TiO2 Composite Fine Powder by Sol-Gel Process

Sol-Gel Process를 이용한 SiO2/TiO2 복합 미립자의 합성

  • Koo, S.M. (Dept. of Industrial Chemistry, Hanyang University) ;
  • Lee, D.H. (Dept. of Industrial Chemistry, Hanyang University) ;
  • Ryu, C.S. (Biochemistry team, R&D Center, Coreana Cosmetics) ;
  • Lee, Y.E. (Inorganic Division, National Institute of Technology and Quality)
  • 구상만 (한양대학교 공업화학과) ;
  • 이동현 (한양대학교 공업화학과) ;
  • 류창석 (코리아나 화장품 연구소) ;
  • 이용은 (국립기술품질원 화학부 무기화학과)
  • Received : 1997.01.08
  • Accepted : 1997.03.11
  • Published : 1997.04.10

Abstract

Monodisperse, spherical $SiO_2/TiO_2$ composite fine powders were prepared by modified Sol-Gel process which $TiO_2$ fine Powders was used as a seed particles for condensation of TEOS (Tetraethyl Orthosilicate). The reaction was carried out under $N_2$ atmosphere at ambient temperature using $NH_3$ as a catalyst. Ethanol was used as a solvent. Drying process was carried out with vacuum trap which cooled by liquid $N_2$. The reaction variables were the concentration of TEOS, the concentration of ammonia, the size of $TiO_2$ seed and molar ratio of $SiO_2/TiO_2$. The optimum condition for the preparation of $SiO_2/TiO_2$ composite fine powders without agglomeration was [TEOS]=0.3M, [$NH_3$]=0.7M, size of $SiO_2/TiO_2$ seed = 200~300nm.

Keywords

Acknowledgement

Supported by : 충남대학교, 한양대학교

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