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EFFECT OF REACTION CONDITIONS ON SIZE AND MORPHOLOGY OF SiO2 POWDER IN A SOL-GEL PROCESS
Korean Journal of Chemical Engineering, September 1996, 13(5), 496-502(7), 10.1007/BF02706000
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Abstract
We have investigated effects of the reaction conditions such as mixing of solution, reactant concentration, feeding time and molecular weight of alcohol solvents on the size and mor- phology of silicon oxide in a sol-gel process in Rushton type reactor. To describe the intensity of mixing of solution the power input, which means the energy dissipated in the solution, was used. The particle nucleation and growth processes of silicon oxide were varied with all the reaction conditions. However, the particle morphology of silicon oxide depended mostly on the reactant concentration and molecular weight of alcohol solvents under various reaction conditions. If the supersaturation level of silicon oxide in the solution was promoted by variation of reaction conditions, the particle nucleation and growth processes were facilitated and it resulted in reduction of relative induction time and in increase of mean particle size of silicon oxide. To explain the principal mechanism of particle growth process of silicon oxide the two-step growth model was applied.
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McCartney ER, Alexander AE, J. Colloid Sci., 13, 383 (1958)
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Nakanishi K, Takamiya Y, J. Ceram. Soc., 72, 421 (1988)
Nielson AE, "Kinetics of Precipitation," Pergamon Press, Oxford, UK (1964)
Ogihara T, Mizutani N, Kato M, J. Am. Ceram. Soc., 86, 476 (1988)
Ohara M, Reid RC, "Modeling Crystal Growth Rate from Solutions," Prentice-Hall, Inc, Englewood, NJ (1973)
Okamura H, Barringer EA, Bowen HK, J. Am. Ceram. Soc., 69, C22 (1986)
Stober W, Fink A, Bohn E, J. Colloid Interface Sci., 26, 62 (1968)
Bell A, Matijevic E, J. Phys. Chem., 78, 2621 (1974)
Brinker CJ, Scherer GW, "Sol-Gel Science," Wiley Pub. Co., Inc., NY (1990)
Dutta A, Tarbell JM, AIChE J., 35(12), 2013 (1989)
Fitchett DE, Tarbell JM, AIChE J., 36(4), 511 (1990)
Jean JH, Ring TA, Am. Ceram. Soc. Bull., 65, 1574 (1986)
Karpinski PH, Chem. Eng. Sci., 40, 641 (1985)
Kim WS, Tarbell JM, Chem. Eng. Commun., 101, 115 (1993)
Kim WS, Tarbell JM, Chem. Eng. Commun., 146, 33 (1996)
Lee SK, Ikeda M, Muzutani N, J. Ceram. Soc. Jpn., 99(4), 300 (1991)
Lee SK, Shinozaki K, Muzutani N, J. Ceram. Soc. Jpn., 100(9), 1140 (1992)
Leung WH, Nancollas GH, J. Inorg. Nucl. Chem., 40, 1871 (1978)
Leung WH, Nancollas GH, J. Cryst. Growth, 44, 1631 (1978)
Liu ST, Nancollas GH, J. Colloid Interface Sci., 44(3), 442 (1973)
Liu ST, Nancollas GH, J. Colloid Interface Sci., 52(3), 582 (1975)
McCabe WL, Smith JC, "Unit Operations for Chemical Engineering," McGraw-Hill, London (1976)
McCartney ER, Alexander AE, J. Colloid Sci., 13, 383 (1958)
Mehta RV, Tarbell JM, AIChE J., 33(7), 1089 (1987)
Nakanishi K, Takamiya Y, J. Ceram. Soc., 72, 421 (1988)
Nielson AE, "Kinetics of Precipitation," Pergamon Press, Oxford, UK (1964)
Ogihara T, Mizutani N, Kato M, J. Am. Ceram. Soc., 86, 476 (1988)
Ohara M, Reid RC, "Modeling Crystal Growth Rate from Solutions," Prentice-Hall, Inc, Englewood, NJ (1973)
Okamura H, Barringer EA, Bowen HK, J. Am. Ceram. Soc., 69, C22 (1986)
Stober W, Fink A, Bohn E, J. Colloid Interface Sci., 26, 62 (1968)
