Chapter 7. Effect of Sintering Parameters and Composition on the Resistivity of a Cermet Used as an Electrical Feedthrough

  1. William J. Smothers
  1. D. P. Kramer,
  2. K. White and
  3. M. D. Kelly

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch7

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

How to Cite

Kramer, D. P., White, K. and Kelly, M. D. (1982) Effect of Sintering Parameters and Composition on the Resistivity of a Cermet Used as an Electrical Feedthrough, in Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318782.ch7

Author Information

  1. MRC-Mound Facility Miamisburg, OH 45342

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

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Keywords:

  • metal etching;
  • enameling;
  • porcelain-enameling systems;
  • characteristic;
  • oxalate coatings

Summary

The improvement of the electrical characteristics of an Al2O3/Mo cermet presently used as an electrical feedthrough was demonstrated. Samples of 50 wt% Al2O3/50 wt% Mo cermets were fabricated using 99% Al2O3, 94% Al2O3, and 91% Al2O3. Sintering was performed at 1400°, 1500°, or 1600°C using three different H2 dew points (–4°, –10°, and +25°C). After sintering, the resistivity of the cermet samples was measured by using a four-point-probe technique. The results show that the resistivity of the cermet decreased significantly as the purity of the Al2O3 used in the cermet decreased from 99% to 91% Al2O3.