40. Densification Behavior of Zirconia Ceramics Sintered Using High-Frequency Microwaves

  1. Manuel E. Brito,
  2. Peter Filip,
  3. Charles Lewinsohn,
  4. Ali Sayir,
  5. Mark Opeka and
  6. William M. Mullins
  1. M. Wolff1,
  2. G. Falk1,
  3. R. Clasen1,
  4. G. Link2,
  5. S. Takayama2 and
  6. M. Thumm2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291283.ch40

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8

How to Cite

Wolff, M., Falk, G., Clasen, R., Link, G., Takayama, S. and Thumm, M. (2005) Densification Behavior of Zirconia Ceramics Sintered Using High-Frequency Microwaves, in Developments in Advanced Ceramics and Composites: Ceramic Engineering and Science Proceedings, Volume 26, Number 8 (eds M. E. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka and W. M. Mullins), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291283.ch40

Author Information

  1. 1

    Saarland University, Department of Powder Technology Building 43, D-66123 Saarbrücken, Germany

  2. 2

    Forschungszentrum Karlsruhe GmbH, EHM Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982619

Online ISBN: 9780470291283

SEARCH

Keywords:

  • zirconia;
  • microstructure;
  • electrophoretic;
  • microwaves;
  • homogenous

Summary

The aim of the investigation was the formation of zirconia ceramics with a fine-grained microstructure and low porosity. The potential of high frequency (30 GHz) microwave sintering in this field was studied. The application of microwaves allowed high heating rates and short processing times because of volumetric heating and enhanced sintering kinetics and thereby a better control of the microstructure. Green bodies were made of tetragonal (8 mol-% Y2O3) and cubic (10 mol-% Y2O3) nanoscale and submicron zirconia powders, dispersed in aqueous suspensions. They were prepared by electrophoretic deposition (EPD) and had relatively high green densities and a homogenous pore size distribution.

Green bodies and ceramics were characterized by means of XRD, SEM, density measurements by means of the Archimedes method and Hg-porosimetry. The main focus of this work is on the investigation of grain size evolution as a function of density.