Chapter 44. Evaluation of Sodium Aluminosilicate Glass Composite Seal with Magnesia Filler

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. K. A. Nielsen,
  2. M. Solvang,
  3. F. W. Poulsen and
  4. P. H. Larsen

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291184.ch44

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

How to Cite

Nielsen, K. A., Solvang, M., Poulsen, F. W. and Larsen, P. H. (2004) Evaluation of Sodium Aluminosilicate Glass Composite Seal with Magnesia Filler, in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291184.ch44

Author Information

  1. Materials Research Department, Risø National Laboratory, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2004

ISBN Information

Print ISBN: 9780470051498

Online ISBN: 9780470291184

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Keywords:

  • SOFC;
  • NAS;
  • CTE;
  • NAS;
  • YSZ

Summary

Glassy seals are used for short term testing, less than 3–4000 hours, of SOFC materials and components in the laboratory. A composite glass seal where Magnesia particles have been suspended in a Sodium Aluminosilicate glass matrix was investigated in order to evaluate the sealing performance towards metallic interconnects of Fe22Cr-steel. Seal compressibility limited the amount of particles, which could be suspended, thus limiting the range of thermal expansion (<11.7 ppm K−1) for the composite material to values at the lower end of the range of technological interest (12–13 ppm K−1). Excellent wetting and strong bond developed between seal and interconnect materials at temperatures above 850°C.