Development of glass sealants for proton conducting ceramic cells: materials, concepts and challenges

IF 3.4 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Mechanical and Materials Engineering Pub Date : 2024-10-28 DOI:10.1186/s40712-024-00184-6

Xanthi Georgolamprou, Ilaria Ritucci, Stéven Pirou, Ragnar Kiebach

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Abstract

In this study, we have successfully developed and tested sealing concepts for symmetrical, planar proton-conducting ceramic cells (PCCCs). Three glass sealants from the field of solid oxide cells were investigated as potential compatible sealing materials for PCCCs. The most promising results were obtained with a SiO₂-MgO-CaO-Na₂O-Al₂O₃-ZrO₂-B₂O₃ glass, which provided a dense, crack-free sealant between the proton-conducting ceramic cells and the Al₂O₃-coated ferritic steels. During the sealing process, a reaction layer between the interface of the BaCe_0.2Zr_0.7Y_0.1O_3-δ contained in the PCCCs and the glass–ceramic, occurred. Here, we propose a reaction mechanism for this interaction and discuss its impact on potential applications. Moreover, next to evaluating potential glass sealants, we have successfully designed and demonstrated a new sealing geometry that prevents a potential gas crossover in the symmetrical proton-conducting ceramic cell.

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质子传导陶瓷电池玻璃密封剂的开发：材料、概念和挑战

在这项研究中，我们成功开发并测试了对称平面质子传导陶瓷电池 (PCCC) 的密封概念。我们研究了固体氧化物电池领域的三种玻璃密封剂，将其作为 PCCCs 的潜在兼容密封材料。结果表明，SiO2-MgO-CaO-Na2O-Al2O3-ZrO2-B2O3 玻璃最有前途，它在质子传导陶瓷电池和 Al2O3 涂层铁素体钢之间提供了致密、无裂缝的密封材料。在密封过程中，PCCCs 所含的 BaCe0.2Zr0.7Y0.1O3-δ 与玻璃陶瓷的界面之间产生了反应层。在此，我们提出了这种相互作用的反应机制，并讨论了其对潜在应用的影响。此外，除了评估潜在的玻璃密封剂，我们还成功设计并演示了一种新的密封几何形状，可防止对称质子传导陶瓷电池中潜在的气体交叉。

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