Sealing Evaluation of an Alkaline Earth Silicate Glass for Solid Oxide Fuel/Electrolyser Cells

Abstract Glass is the most recognised material to seal solid oxide fuel/electrolyser cell components. We have developed a SrO‐La 2 O 3 ‐Al 2 O 3 ‐SiO 2 (SABS‐0) based seal glass with all the desired thermophysical properties and thermochemical stability. In this study, the SABS‐0 seal glass is sandwiched between AISI 441 interconnect alloy and fully stabilised ZrO 2 electrolyte for sealing ability evaluation. The sealing performance and the thermal cycling resistance of the tri‐layer assembly are tested by a pressure leakage test with 3–20 K min –1 heating rates for 2,500 h and 100 thermal cycles. The sealing strength is evaluated by a rupture strength test. The results show that the SABS‐0 glass is hermetic for at least 2,500 h and has high rupture strength for solid oxide fuel/electrolyser cell component sealing. The stress state for the tri‐layer assembly has been analysed using three different approaches.

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