Preparation of Silica Sol by Partial Hydrolysis of TEOS and High Purity Silica Glass Fiber

TEOS의 부분가수분해에 의한 실리카 졸의 합성과 유리섬유 제조

  • Yang, Hyun S. (Dept. of Fine Chemicals Eng. & Chem., Chungnam Nat'l Univ.) ;
  • Kwon, Oh H. (Dept. of Industrial Chemistry, Graduate School, Chungnam Nat'l Univ.) ;
  • Lee, Jae D. (Inorganic Materials Div., Korea Research Institute of Chemical Technology) ;
  • Rho, Jae S. (Dept. of Fine Chemicals Eng. & Chem., Chungnam Nat'l Univ.) ;
  • Kim, Young H. (Dept. of Fine Chemicals Eng. & Chem., Chungnam Nat'l Univ.)
  • 양현수 (충남대학교 공과대학 정밀공업화학과) ;
  • 권오현 (충남대학교 대학원 공업화학과) ;
  • 이재도 (한국화학연구소 무기재료연구부) ;
  • 노재성 (충남대학교 공과대학 정밀공업화학과) ;
  • 김영호 (충남대학교 공과대학 정밀공업화학과)
  • Received : 1995.05.11
  • Accepted : 1996.09.03
  • Published : 1996.10.10

Abstract

At the ratio [$H_2O$]/[TEOS]=1.7, the silica sol was synthesized by partial hydrolysis in the presence of acid catalyst. After stabilizing the silica sol by trimethylsilylation, the molecular weight and viscosity of the sol obtained at various reaction times were examined to determine a best spinnability of the sol. Gel fibers were prepared from the sol solution after removing solvent in the solution, and the gel fibers were heated at $1,000^{\circ}C$. The prepared silica fibers were in the shape of circular cross-section and their tensile strength and $SiO_2$ purity were $83{\pm}20kg/mm^2$ and about 99.997%, respectively.

Keywords

Acknowledgement

Supported by : 학술진흥재단

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