Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Effect of annealing temperature on surface properties of chemical solution derived silicate fiber

화학적 용액법으로 제조한 실리케이트 섬유의 표면 특성에 미치는 열처리 온도의 영향

  • 황규석 (남부대학교 자동차기계공학부) ;
  • 김상복 (남부대학교 자동차기계공학부) ;
  • 이영환 (남부대학교 자동차기계공학부) ;
  • 장승욱 (남부대학교 자동차기계공학부) ;
  • 오정선 (조선대학교 화학과) ;
  • 안준형 (전남대학교 세라믹공학과) ;
  • 김병훈 (전남대학교 세라믹공학과)
  • Published : 2003.10.01
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Abstract

In this work, chemical-solution derived silicate fibers were prepared by mixing tetraethyl orthosilicate, ethanol, distilled water, and hydrochloric acid in order to investigate surface roughness of fiber. Silicate fibers were drawn by using a viscous solution after evaporation at $80^{\circ}C$. The dried gel fibers were finally annealed at $1000^{\circ}C$, $1100^{\circ}C$, $1200^{\circ}C$ and $^1300{\circ}C$ for 60 min in dried air (flow rate = ∼200 ml/min). The crystallinity of the heat-treated silica fiber was analyzed by the X-ray diffraction $\theta$-2$\theta$ scan. A field emission-scanning electron microscope and an atomic force microscope were used to evaluate surface properties. The silicate fiber annealed at $1300^{\circ}C$ showed high value of root mean square roughness and had a relatively inhomogeneous surface structure.

본 연구에서는 섬유의 표면 거칠기를 조사하기 위하여 tetraethyl orthosilicate, 에탄올, 증류수 및 염산의 혼합 용액을 이용하여 실리케이트 섬유를 제조하였다. $80^{\circ}C$에서 증발시킨 점성용액으로부터 섬유를 인상하여 제조하였으며, 건조된 겔 섬유는 건조공기를 흘려보내며(flow rate = ∼200 m1/min) $1000^{\circ}C$, $1100^{\circ}C$, $1200^{\circ}C$ 및 $1300^{\circ}C$로 60분간 최종열처리를 행하였다 열처리된 섬유의 결정화도는 X-선 회절 $\theta$-2$\theta$ 분석을 통하여 행하였으며, 표면 특성을 조사하기 위하여 전계 방사 주사 전자현미경과 원자간력 현미경을 이용하였다. $1300^{\circ}C$로 열처리된 실리케이트 섬유는 높은 root mean square 거칠기 값을 보였으며, 비교적 불균질한 표면 구조를 가지고 있었다.

Keywords

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