27. Glass-Ceramic Materials of the System BaO-CaO-SiO2 as Sealants for SOFC Applications

  1. Narottam P. Bansal
  1. S.-M. Gross,
  2. T. Koppitz,
  3. J. Remmel and
  4. U. Reisgen

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch27

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

Gross, S.-M., Koppitz, T., Remmel, J. and Reisgen, U. (2005) Glass-Ceramic Materials of the System BaO-CaO-SiO2 as Sealants for SOFC Applications, 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.ch27

Author Information

  1. Forschungszentrum Jülich, Germany

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:

  • glass-ceramics;
  • netzsch dsc 404;
  • dilatometric softening temperature;
  • CaO-SiO2;
  • dilatometric measurements

Summary

A glass-ceramic based on the ternary system BaO-CaO-SiO2 was investigated for its application as sealing material for the SOFC. Beside measurements of the physical and chemical properties of the glass itself, the joining properties were investigated. Characterization of the material is done by measurements of the coefficient of thermal expansion, the transformation temperature and the dilatometric softening temperature. The crystallization behavior was analyzed by differential scanning calorimetry and X-ray diffraction. Joining tests were carried out on sandwiched samples of two steel coupons with glass-ceramic in between. These samples showed gas tightness with very low leakage rates, even after thermal cycling. Microstructural investigations have shown that the glass scalant interacts with the oxide scale of the steel, yielding a strong bonding to the surface of the metal. All in all, the investigated glass composition fulfills the requirements as a sealing material of SOFC stacks.