Chapter 54. Sol-Gel Processing of Continuous Mullite Fibers

  1. John B. Wachtman Jr.
  1. S. Al-Assafi,
  2. T. Cruse,
  3. J. H. Simmons,
  4. A. B. Brennan and
  5. M. D. Sacks

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch54

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Al-Assafi, S., Cruse, T., Simmons, J. H., Brennan, A. B. and Sacks, M. D. (1994) Sol-Gel Processing of Continuous Mullite Fibers, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch54

Author Information

  1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • sol-gel process;
  • continuous mullite fibers;
  • hydrolysis and polycondensation conditions;
  • continuous fiber spinning;
  • theoretical density

Summary

A sol-gel process was developed to produce continuous mullite fibers. Spinnability of the sol was achieved by controlling hydrolysis and polycondensation conditions. The rheological properties needed for continuous fiber spinning were determined. The effect of aging of spun fibers on mullite formation was determined. Under optimum processing conditions, mullite formation was observed at ∼1000°C and theoretical density was approached at ∼1300°C. Fibers heat treated at 1500°C showed approximately 1 μm grain sizes. Exposure to a concentrated HF solution had no discernable effect on the fibers which suggested that little or no siliceous glass was present.