Chapter 18. Processing of Wollastonite - Mullite Composites from Dense Aqueous Suspensions

  1. John B. Wachtman Jr.
  1. M. Deveau,
  2. R. Bryden,
  3. K. J. Konsztowicz and
  4. W. F. Caley

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314234.ch18

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

How to Cite

Deveau, M., Bryden, R., Konsztowicz, K. J. and Caley, W. F. (1993) Processing of Wollastonite - Mullite Composites from Dense Aqueous Suspensions, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch18

Author Information

  1. Technical University of Nova Scotia, Halifax, NS Canada B3J 2X4

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375273

Online ISBN: 9780470314234

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Keywords:

  • wollastonite particles;
  • eliminated;
  • centrifuged;
  • pseudoplastic;
  • creep resistance

Summary

A wollastonite-mullite composite system has been investigated in order to assess the viability of using a natural mineral as a reinforcing dispersed phase. The wollastonite particles were mixed with high purity commercial mullite in aqueous suspension in the basic pH range. Prior to mixing, hard agglomerates were eliminated from the mullite powder by sedimentation. In order to increase solid content, the homogenized slurry was centrifuged and redispersed using a deflocculant; the final suspension contained approximately 50 vol% solids, and was pseudoplastic at low, and dilatant at higher shear rates.