Sol-Gel Process를 이용한 SiO2/TiO2 복합 미립자의 합성

구상만; 이동현; 류창석; 이용은

Journal of the Korean Industrial and Engineering Chemistry, Vol.8, No.2, 301-307, April, 1997

Export Citation

Sol-Gel Process를 이용한 SiO2/TiO2 복합 미립자의 합성

Preparation of SiO₂/TiO₂ Composite Fine Powder by Sol-Gel Process

구상만, 이동현, 류창석, 이용은

초록

응집이 없는 단분산의 SiO₂/TiO₂ 복합 미립자를 얻기 위하여 TiO₂ seed가 분산되어 있는 에탄을 수용액과 TEOS (Tetraethyl Orthosilicate)를 에탄올에 녹인 용액을 혼합하여 TiO₂ 주위에서 TEOS가 가수분해 및 축합 반응이 일어나도록 유도하여 복합 미분말을 제조하였다. 촉매로 암모니아를 사용하였고, 반응온도는 실온이었다. 반응변수는 TEOS의 농도, 암모니아의 농도, TiO₂ seed의 크기 및 양이었다. 응집이 없는 복합 미립자를 얻기 위한 최적조건은 [TEOS]=0.3M, [NH₄OH]=0.7M, TiO₂ seed의 크기가 200∼300nm이었고, 이때 0.8∼0.9㎛의 입자크기를 갖는 복합입자를 얻을 수 있었다.

Monodisperse, spherical SiO₂/TiO₂ composite fine powders were prepared by modified Sol-Gel process which TiO₂ fine Powders was used as a seed particles for condensation of TEOS (Tetraethyl Orthosilicate). The reaction was carried out under N₂ atmosphere at ambient temperature using NH₃ as a catalyst. Ethanol was used as a solvent. Drying process was carried out with vacuum trap which cooled by liquid N₂. The reaction variables were the concentration of TEOS, the concentration of ammonia, the size of TiO₂ seed and molar ratio of SiO₂/TiO₂. The optimum condition for the preparation of SiO₂/TiO₂ composite fine powders without agglomeration was [TEOS]=0.3M, [NH₃]=0.7M, size of TiO₂ seed = 200∼300nm.

[References]

Brinker CJ, Scherer GW, Sol-Gel Science, Academic Press Inc. (1991)
Hench LL, West JK, Chemical Processing of Advanced Materials, John Wiley & Sons, Inc. (1992)
Iler RK, The Chemistry of Silica, John Wiley (1979)
Stober W, Fink A, Bohn E, J. Colloid Interface Sci., 26, 62 (1968)
Rahaman MN, Ceramic Processing and Sintering, Marcel Dekker, Inc. (1995)
Tan CG, Bowen BD, Epstein N, J. Colloid Interface Sci., 118 (1987)
Hench LL, West JK, Chem. Rev., 90, 33 (1990)
Ogihara T, Nakajima H, Yanagawa T, Ogata N, Yoshida K, J. Am. Ceram. Soc., 76, 2571 (1993)
Ying JY, Benziger JB, J. Am. Ceram. Soc., 76, 2561 (1993)
Hyun SH, Kang BS, J. Am. Ceram. Soc., 77, 3093 (1994)
Hardy AB, Rhine W, Bowen HK, J. Am. Ceram. Soc., 76, 97 (1993)
Shih WH, Kisailus D, Wei Y, Mater. Lett., 24, 13 (1995)
Yoldas BE, J. Mater. Sci., 21, 1080 (1986)
Jean JH, Ring TA, Langmuir, 2, 151 (1986)
Barringer EA, Bowen HK, Communication of the Am. Ceram. Soc., c-199 (1982)
Look JL, Zukoski CF, J. Am. Ceram. Soc., 75, 1587 (1992)
VanHelden AK, Jansen JW, Vrij A, J. Colloid Interface Sci., 81, 354 (1981)

[Referenced By]

[1] Brinker CJ, Scherer GW, Sol-Gel Science, Academic Press Inc. (1991)

[2] Hench LL, West JK, Chemical Processing of Advanced Materials, John Wiley & Sons, Inc. (1992)

[3] Iler RK, The Chemistry of Silica, John Wiley (1979)

[4] Stober W, Fink A, Bohn E, J. Colloid Interface Sci., 26, 62 (1968)

[5] Rahaman MN, Ceramic Processing and Sintering, Marcel Dekker, Inc. (1995)

[6] Tan CG, Bowen BD, Epstein N, J. Colloid Interface Sci., 118 (1987)

[7] Hench LL, West JK, Chem. Rev., 90, 33 (1990)

[8] Ogihara T, Nakajima H, Yanagawa T, Ogata N, Yoshida K, J. Am. Ceram. Soc., 76, 2571 (1993)

[9] Ying JY, Benziger JB, J. Am. Ceram. Soc., 76, 2561 (1993)

[10] Hyun SH, Kang BS, J. Am. Ceram. Soc., 77, 3093 (1994)

[11] Hardy AB, Rhine W, Bowen HK, J. Am. Ceram. Soc., 76, 97 (1993)

[12] Shih WH, Kisailus D, Wei Y, Mater. Lett., 24, 13 (1995)

[13] Yoldas BE, J. Mater. Sci., 21, 1080 (1986)

[14] Jean JH, Ring TA, Langmuir, 2, 151 (1986)

[15] Barringer EA, Bowen HK, Communication of the Am. Ceram. Soc., c-199 (1982)

[16] Look JL, Zukoski CF, J. Am. Ceram. Soc., 75, 1587 (1992)

[17] VanHelden AK, Jansen JW, Vrij A, J. Colloid Interface Sci., 81, 354 (1981)