Abstract
The preparation of spinnable sols has been developed to obtain a new type of sol-gel derived pure alumina fiber. The starting material was aluminum sec-butoxide, which was modified in a first step with glycolether, e.g., isopropoxyethanol. This leads to a partial replacement of alkoxy groups via alcoholysis and a change of the precursor structure from a trimeric to a tetrameric one. In the second step, carboxylation, the transformation to six-coordinated aluminum could be observed. Due to the formation of a sol with Newtonian flow behavior after hydrolysis, gel fibers up to several kilometers long could be drawn directly from the clear colorless sol with spinning velocities up to 200 m/min. The addition of an organic filament-forming polymer is not necessary. The sol is spinnable for periods up to one year. The transformation of the gel fiber to α-Al2O3 occurs at 1150° C.
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References
Maki, T. and Sakka, S., J. Non-Cryst. Solids 100, 303 (1988).
Lucuta, P.G., Halliday, J.D., and Christian, B., J. Mater. Sci. 27, 6053 (1992).
Ikoma, H., Katayama, S., Sekine, M., and Nomiya, Y., Am. Ceram. Soc., Annual Meeting, Indianapolis, 1989.
Yogo, T. and Iwahara, H., J. Mater. Sci. 27, 1499 (1992).
Yogo, T., Kodama, S., and Iwahara, H., J. Mater. Sci. 28, 105 (1993).
Kriz, O., Casensky, B., Lycka, A., Fusek, J., and Hermanek, S., J. Magn. Reson. 60, 375 (1984).
Akitt, J.W., Gessner, W., and Weinberger, M., Magn. Reson. Chem. 26, 1047 (1988).
Sakka, S. and Yoko, T., J. Non-Cryst. Solids 147 & 148, 394 (1992).
Rai, A.K. and Mehrotra, R.C., J. Indian Chem. Soc. 40, 359 (1963).
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Glaubitt, W., Sporn, D. & Jahn, R. A new way to spinnable sols derived from modified aluminumalkoxides. J Sol-Gel Sci Technol 2, 525–528 (1994). https://doi.org/10.1007/BF00486302
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DOI: https://doi.org/10.1007/BF00486302