Abstract
High temperature solid oxide cells (SOCs) play an important role in the worldwide green energy transition due to the high efficiency and great flexibility. For the cost and efficiency optimization of electrolyte-supported SOCs, a crucial property is the mechanical stability of the cell, which is mainly provided by the electrolyte. In this study, the authors investigate the tensile mechanical properties of 3% yittria-stabilized zirconia (3YSZ) ceramic electrolyte tapes, allowing the evaluation of a large material volume compared to the flexural test. A novel gripping system for misalignment minimization is developed. The sample machining is found to have an influence on the strength, as ground samples have an average strength above 1000 MPa, while the laser cut ones show strengths below 500 MPa. The influence of edge roughness and phase transformation during grinding is determined and the crack initiation point is examined.
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