Porous Alkali Resistance Glass Preparation of ZrO2-SiO2 System by the Sol-Gel Method

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J. Korean Ceram. Soc. > Volume 29(1); 1992 > Article

Journal of the Korean Ceramic Society 1992;29(1): 35.

졸-겔법에 의한 내알칼리성 다공질 ZrO$_2$-SiO$_2$계 유리 제조

신대용, 한상목

강원대학교 재료공학과

Porous Alkali Resistance Glass Preparation of ZrO2-SiO2 System by the Sol-Gel Method

ABSTRACT

Porous glass in the ZrO2-SiO2 system containing up to 30 mol% zirconia were prepared from the mixed solutions of Zr(O.nC3H7)4 and partially prehydrolyzed TEOS by the sol-gel method. Pore characteristics, physical properties and alkali resistance were investigated. The gels converted into the porous glass by heating at $700^{circ}C$, it was found that the glass like skeleton was already made up in lower temperature regions. The specific surface area of the porous glass was 227 $m^2$/g, average mean pore size was about 19$AA$ and porosity was 19.2%, pore characteristics and physical properties depended on heating temperature. Alkali resistance of the porous glass increased as the zirconia content increased, because of the appearance of Zr-enriched layer at glass surface.