Title
Viscous Sealing Glass Development for Solid Oxide Fuel Cells
Abstract
Glass compositions have been formulated and tested for use as viscous seals for solid oxide fuel cells (SOFCs). These alkali-free borosilicate glasses possess desirable thermomechanical properties and thermo-chemical characteristics, and exhibit promising hermetic sealing and self-healing behavior under SOFC operational conditions. The dilatometric softening points (Ts) and the glass transition temperatures (Tg) of the glasses are generally under 650°C, the lower bound of the SOFC operating temperature. To date, glass seals between a YSZ-NiO/YSZ bilayer and aluminized stainless steel 441 have survived 100 thermal cycles (750°C to room temperature) in dry air at a differential pressure of 0.5 psi (26 torr) over the course of > 3,300 hours without failure, and 103 thermal cycles under wet forming gas. Seals intentionally cracked upon quenching from 800°C to RT at >25°C/s become hermetic upon reheating to 700°C and higher.
Recommended Citation
C. Kim et al., "Viscous Sealing Glass Development for Solid Oxide Fuel Cells," Ceramic Engineering and Science Proceedings, vol. 34, no. 4, pp. 123 - 132, Wiley-Blackwell, Jan 2014.
The definitive version is available at https://doi.org/10.1002/9781118807750.ch12
Meeting Name
Advances in Solid Oxide Fuel Cells IX -- 37th International Conference on Advanced Ceramics and Composites (2013: Jan. 27-Feb. 1, Daytona Beach, FL)
Department(s)
Nuclear Engineering and Radiation Science
Second Department
Materials Science and Engineering
Keywords and Phrases
Differential pressures; Dilatometric softening; Glass compositions; Operating temperature; Operational conditions; Room temperature; Solid oxide fuel cells (SOFCs); Thermomechanical properties; Borosilicate glass; Ceramic materials; Hermetic seals; Thermal cycling; Solid oxide fuel cells (SOFC)
International Standard Serial Number (ISSN)
0196-6219
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2014 Wiley-Blackwell, All rights reserved.
Publication Date
01 Jan 2014