Optical Transparency and Microstructure of <TEX>$TiO_2-SiO_2$</TEX> Binary Aerogels

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J. Korean Ceram. Soc. > Volume 32(3); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(3): 321.

$TiO_2-SiO_2$ 이성분계 Aerogel의 광학적 투명성과 미세구조

이종혁, 최수영, 김창은, 김구대¹, 이해욱²

연세대학교 세라믹공학과
¹한국과학기술원 세라믹스연구부
²가야요업대학 전자세라믹공학과

Optical Transparency and Microstructure of $TiO_2-SiO_2$ Binary Aerogels

ABSTRACT

Homogeneous and monolithic TiO2-SiO2 binary aerogels were prepared by supercritical drying. Optical transparency was increased with adding acid catalyst during two step hydrolysis and with decreasing water content. These differences in optical transparency were related to microstructures of gel network formed through polycondensation reaction during supercritical drying process, rather than the final composition of aerogel.

Key words: $TiO_2-SiO_2$, Aerogel, Supercritical drying, Optical transparency, Microstructure