Solid oxide fuel cells (SOFCs) are used for a wide range of applications including power generation, automobile etc. Planar SOFC configurations appear superior to other form, like tubular based onsuperior power density and efficiency. A major issue in planar SOFCs is the requirement that hermetic sealing must be formed between the solid electrolyte and/or the ceramic anode with the metallic interconnect in order to prevent fuel - oxidant mixing and to provide electrical insulation. The wide range of thermal expansion characteristics and the thermal stability advantages of glass based sealant (or glass-ceramics) are important factors in sealing. To ascertainacceptable lifetime, interfacial reactions and diffusion of both metallic and glass species should be minimized. Glass based sealant capable to form rigid seal between the interconnect and other SOFC parts, which in turn reduce the leak rate within acceptable limit.
- Tuneable compositions and properties (e.g. CTE, resistance to reaction with adjacent part).
- Wide range of glass compositions for suitability as sealant
- Simplicity in makingglass frits, powders and subsequently sealing paste.
- Compatibility with the SOFC stack components such as cathode, anode and interconnect
- Application temperature: 800-8500c
- Ability to self-heal the crack (if any) in seal during operation
- Sealant for SOFC stack.
