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Factors influencing the formation of hollow ceramic microspheres by water extraction of colloidal droplets

  • Jay G. Liu (a1) and David L. Wilcox (a1)

Abstract

Hollow ceramic microspheres of Al2O3, SiO2, and mullite have been prepared by the combination of an emulsion technique with a water extraction sol-gel method. Concentration of sol, initial droplet size, and water extraction rate of the system are found to be the important process parameters controlling the size and wall thickness of the hollow microspheres, and their influences are shown. A model that correlates the morphology of microspheres to concentration and water extraction rate is proposed and is in good agreement with the experimental observations. The capability and limitation of this process for forming hollow microspheres are demonstrated. It was shown that hollow microspheres with sizes greater than 5 μm could be readily prepared, while a limitation was met for sizes less than 1 μm, in which case solid microspheres were normally formed.

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1McMurrer, M., Plastics Compounding, November/December, 16 (1985).
2Hendricks, C. D., in Glass Science and Technology, Vol. 2 (Academic Press, New York, 1984), p. 149.
3Downs, R. L., Ebner, M. A., and Miller, W. J., Sol-Gel Technology for Thin Films, Fibers, Performs, Electronics, and Specialty Shapes, edited by Klein, L. C. (Noyes Publications, Park Ridge, NJ, 1988), p. 330.
4Siliva, P., Cross, L. E., Gururaja, T. R., and Scheetz, B. E., Mater. Lett. 4 (11,12), 475 (1986).
5Kellerman, D. W., in Proceedings of the 37th Electronic Components Conference (IEEE, Boston, MA, 1987), p. 316.
6Vernetti, D. J. and Wilcox, D. L., in Proceedings of the 1992 International Symposium on Microelectronics (ISHM, San Francisco, CA, 1992), p. 117.
7Beck, W. R. and O'Brien, D. L., United States Patent 3 365 315 (1968), assigned to the 3M Company.
8Hendricks, C. D., Rosencwaig, A., Woerner, R. L., Koo, J. C., Dressier, J. L., Sherohman, J. W., Weinland, S. L., and Jeffries, M., J. Nucl. Mater. 85/86, 107 (1979).
9Veatch, F., Alford, H. E., and Croft, R. D., United States Patent 3 030 215 (1962), assigned to the Standard Oil Company.
10Netting, D. I., United States Patent 3 794 503 (1974); United States Patent 3 796 777 (1974); United States Patent 3 888 957 (1975), assigned to Philadelphia Quartz Company.
11Walsh, R. J., United States Patent 3 161 468 (1964), assigned to Monsanto Company.
12Kim, K. K., Jang, K. Y., and Upadhye, R. S., J. Am. Ceram. Soc. 74 (8), 1987 (1991).
13Jada, S. S., J. Mater. Sci. Lett. 9 (5), 565 (1990).
14Gadalla, A. M. and Yu, H-F., J. Mater. Res. 5, 2923 (1990).
15Sarikaya, Y. and Akinc, M., Ceram. Int. 14, 239 (1988).
16Sowman, H. G., United States Patent 4 349 456 (1982), assigned to the 3M Company.
17Vernetti, D. J. and Wilcox, D. L., in Proceedings of the 1992 International Conference on Multichip Modules (ISHM/IEPS, Denver, CO, 1992), p. 300.
18Messing, G. L., Zhang, S., and Jayanthi, G. V., J. Am. Ceram. Soc. 76 (11), 2707 (1993).
19Zhang, S. and Messing, G. L., J. Am. Ceram. Soc. 73 (1), 61 (1990).
20Liu, J. G. and Wilcox, D. L., in Better Ceramics Through Chemistry VI edited by Sanchez, C., Brinker, C. J., Mecartney, M. L., and Cheetham, A. (Mater. Res. Soc. Symp. Proc. 346, Pittsburgh, PA, 1994), p. 201.
21Charlesworth, D. H. and Marshall, W. R. Jr., AIChE J. 6 (1), 9 (1960).
22Jayanthi, G. V., Zhang, S. C., and Messing, G. L., Aerosol Sci. Technol. 19, 478 (1993).
23Kelly, L., Kleinsteuber, A. T., Clinton, S. D., and Dean, O. C., Indus. & Eng. Chem.–Process Design & Development 4 (2), 212 (1965).
24Haas, P. A., Bond, W. D., Lloyd, M. H., and McBride, J. P., in Thorium Fuel Cycle (Proc. 2nd Int. Thorium Fuel Cycle Symp., Gatlinburg, TN, 1966), p. 391.
25Wymer, R. G., in Sol-Gel Processes for Ceramic Nuclear Fuels (Proc. Panel on Sol-Gel Processes for Ceramic Nuclear Fuels, Vienna, Austria, 1968), p. 131.

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Factors influencing the formation of hollow ceramic microspheres by water extraction of colloidal droplets

  • Jay G. Liu (a1) and David L. Wilcox (a1)

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