28. Layered Composite Seals for Solid Oxide Fuel Cells (SOFC)

  1. Narottam P. Bansal
  1. Raj N. Singh and
  2. S. S. Parihar

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch28

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

How to Cite

Singh, R. N. and Parihar, S. S. (2005) Layered Composite Seals for Solid Oxide Fuel Cells (SOFC), in Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4 (ed N. P. Bansal), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291245.ch28

Author Information

  1. Department of Chemical and Materials Engineering University of Cincinnati, P. O. Box 210012, Cincinnati, OH 45241-0012

Publication History

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

ISBN Information

Print ISBN: 9781574982343

Online ISBN: 9780470291245

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Keywords:

  • SOFC;
  • yttria stabilized zirconia-electrolyte;
  • anode;
  • doped lanthanide perovskite cathode;
  • essentially alumina fiber

Summary

A variety of seals such as metal-metal, metal-ceramic, and ceramic-ceramic are required for a functioning SOFC. These seals must function at high temperatures between 600-900°C and in oxidizing and reducing environments of the fuels and air. Among the different type of seals, the metal-ceramic and ceramic-ceramic seals require significant attention, research, and development because the brittle nature of ceramics/glasses can lead to fracture and loss of seal integrity and functionality. This paper addresses the needs and possible approaches for high temperature ceramic-metal seals for SOFC and seals fabricated using some of these approaches. A new concept of layered composite ceramic-metal seal is proposed for fabricating seals among material combinations with significant thermochemical and thermomechanical incompatibilities. Performance of seals incorporating this concept is demonstrated using leak tests.