Resilient Sealing Materials for Solid Oxide Fuel Cells
This report describes the development of ''invert'' glass compositions designed for hermetic seals in solid oxide fuel cells (SOFC). Upon sealing at temperatures compatible with other SOFC materials (generally {le}900 C), these glasses transform to glass-ceramics with desirable thermo-mechanical properties, including coefficients of thermal expansion (CTE) over 11 x 10{sup -6}/C. The long-term (>four months) stability of CTE under SOFC operational conditions (e.g., 800 C in wet forming gas or in air) has been evaluated, as have weight losses under similar conditions. The dependence of sealant properties on glass composition are described in this report, as are experiments to develop glass-matrix composites by adding second phases, including Ni and YSZ. This information provides design-guidance to produce desirable sealing materials.
- Research Organization:
- The Curators Of The University Of Missouri
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG26-04NT42175
- OSTI ID:
- 901789
- Country of Publication:
- United States
- Language:
- English
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