A Study on the Preparation and Characterization of <TEX>$TiO_2-SiO_2$</TEX> Aerogels by Supercritical Drying

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J. Korean Ceram. Soc. > Volume 31(6); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(6): 623.

Supercritical Drying에 의한 $TiO_2-SiO_2$ 이성분계 Aerogel의 제조 및 그 특성분석

김창은, 이종혁, 김구대¹, 이해욱²

연세대학교 세라믹공학과
¹한국과학기술연구원 세라믹스연구부
²가야요업대학 전자세라믹공학과

A Study on the Preparation and Characterization of $TiO_2-SiO_2$ Aerogels by Supercritical Drying

ABSTRACT

TiO2-SiO2 homogeneous sol was prepared by means of complexing titanium iso-propoxide with acetylacetone. Crack-free, monolithic binary TiO2-SiO2 aerogels were obtained by evacuating the solvent under the pressure of 2,200 psi at 28$0^{circ}C$, which was determined as a supercritical condition. The microstructure of the binary aerogels was observed to be finer and more homogeneous as the Ti content decreased. The microstructure was related to the optical transition of aerogels from opaque to transluscent.