Chapter 11. Near-Shape Manufacturing of Ceramics and Glasses by Electrophoretic Deposition Using Nanosized Powders

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Jan Tabellion,
  2. Elfi Jungblut and
  3. Rolf Clasen

Published Online: 27 MAR 2008

DOI: 10.1002/9780470294802.ch11

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

How to Cite

Tabellion, J., Jungblut, E. and Clasen, R. (2008) Near-Shape Manufacturing of Ceramics and Glasses by Electrophoretic Deposition Using Nanosized Powders, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294802.ch11

Author Information

  1. Saarland University, Department of Powder Technology Geb. 43A, D-66123 Saarbrucken

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375839

Online ISBN: 9780470294802

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Keywords:

  • silica glasses;
  • electrophoretic deposition;
  • ceramics;
  • nano-particles;
  • sintered zirconia

Summary

Reducing the shrinkage during sintering is the key factor to enable near-shape manufacturing of complex ceramics or silica glasses. This can be achieved by increasing the green density of the green bodies up to very high values. A linear shrinkage during sintering of e.g. only 7 % can be reached, if a green body has a density of 80 %TD. One possible route to reach such high green densities is to use mixtures of powders with significantly different particle size distribution, such as nanosized particles and particles with a maximum of size distribution in the micrometer range. In this case, comparatively high green strength is achieved because the nano-particles act as an inorganic binder phase. Since deposition rate is independent from particle size, mixtures of nanosized and larger powders can be shaped by electrophoretic deposition without any size-dependent separation. Different complex shapes as well as structured components were electrophoretically deposited from aqueous suspensions of mixtures of nanosized and bigger powders of silica and zirconia. by optimizing size distribution homogeneous green bodies with a density up to 84 %TD were obtained, which showed a comparably low (linear) shrinkage during sintering of less than 8 %. Thus, near-shape manufacturing of complex and structured ceramic and glass components becomes possible.