Chapter 52. Co-Dispersion of Mullite and Wollastonite in Aqueous Suspensions

  1. John B. Wachtman Jr.
  1. R. Bryden1,
  2. K. J. Konsztowicz1,
  3. W. F. Calcy1 and
  4. P. W. Kingston2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313978.ch52

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10

How to Cite

Bryden, R., Konsztowicz, K. J., Calcy, W. F. and Kingston, P. W. (1994) Co-Dispersion of Mullite and Wollastonite in Aqueous Suspensions, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313978.ch52

Author Information

  1. 1

    Technical University of Nova Scotia, Halifax, NS, B3J 2X4

  2. 2

    Ontario Ministry of Northern Development and Mines, Tweed, ON, K0K 3J0

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375198

Online ISBN: 9780470313978

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Keywords:

  • ceramics;
  • combustor;
  • spectrometer;
  • combustion;
  • thermal expansion coefficient

Summary

The study of co-dispersion of mullite matrix powder and wollastonitc particles in aqueous suspensions was performed at various pH values. The optimum conditions for wet-processing were determined by combining the viscosity measuremcnts with SEM observations of powders deposited on microfilters. This latter procedure was applied to visually confirm the state of dispersion/flocculation of powder mixtures at pH values most interesting from the processing point of view. It was found that the minimum viscosity for wollastonite/mullite composite mixtures in aqueous suspensions occured at pH 11.6. At higher solid content (60 wt%) these slurries were shear-thinning, which indicated their tendency to flocculate.