Study on the Properties of <TEX>$B_2O_3$</TEX>-<TEX>$SiO_2$</TEX>and <TEX>$Al_2O_3$</TEX>-<TEX>$SiO_2$</TEX>Coating Films by the Sol-Gel Method

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J. Korean Ceram. Soc. > Volume 27(5); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(5): 583.

Sol-Gel법으로 제조한 $B_2O_3$-$SiO_2$와 $Al_2O_3$-$SiO_2$ 박막의 특성에 관한 연구

황규석, 김병훈, 최석진

전남대학교 무기재료공학과

Study on the Properties of $B_2O_3$-$SiO_2$and $Al_2O_3$-$SiO_2$Coating Films by the Sol-Gel Method

ABSTRACT

Glass films in the binary system B2O3-SiO2 and Al2O3-SiO2 were prepared on soda-lime-silica slide glass by the dip-coating technique from TEOS and boric acid or aluminum nitrate. Thickness of the films varying with viscosity and withdrawal speed were measured and effect of composition and firing temperature on the properties such as transmittance and refractive index were investigated. nM2O3.(100-n)SiO2(M=B or Al) films containing up to 20mol% B2O3 and 40mol% Al2O3 were transparent. Maximum transmittance at visible range were obtained for the sample containing 15mol% Ba2O3 and 32.5mol% Al2O3 and heat-treated at 50$0^{circ}C$, respectively. Refractive index of the film containing 15mol% B2O3 was mininum in the B2O3-SiO2 binary system and minimal refractive index was appeared at the film containing 32.5mol% Al2O3. In IP spectra, addition of B2O3 were increased absorption peak intensity of B-O and Si-O-B bond and addition of Al2O3 were decreased absorption peak intensity of Si-O bond, respectively.