Glass Ceramic Sealants for Solid Oxide Cells

Sealants for high-temperature fuel cells and electrolyzers must exhibit special properties due to the high operating temperatures, the reactive atmospheres, and the electric voltage between the sealed interconnects. Various technological approaches and material classes are being pursued for this application. At the same time, there are also successful stack concepts that completely abandon the use of sealants. With regard to the materials in consideration, metallic brazing alloys and such based on mica compression seals play a marginal role and are only used in individual cases. Glass-ceramic seals are predominantly used and are therefore the focus of this section. A general insight into the topic of glass-ceramic sealants and their properties as well as strategies for their development will be provided. The content will help you better understand the behavior of complex glass-ceramic sealants. Important sections also embrace discussions on their degradation behavior under typical SOC conditions as well as their mechanical properties.