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首页> 外文期刊>RSC Advances >The phase evolution, electrical stability and chemical compatibility of sealing glass–ceramics for solid oxide fuel cell applications: effect of La2O3 or CeO2
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The phase evolution, electrical stability and chemical compatibility of sealing glass–ceramics for solid oxide fuel cell applications: effect of La2O3 or CeO2

机译：固体氧化物燃料电池应用中密封玻璃陶瓷的相位演化，电稳定性和化学兼容性：La2O3或CEO2的影响

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摘要

In spite of the fact that rare earth oxides can improve the sealing properties of glass–ceramics, the electrical stability of these glass–ceramics under Solid Oxide Fuel Cell (SOFC) operational conditions still remains ambiguous. In this work, the electrical stability of glass–ceramics doped with La _(2) O _(3) or CeO _(2) under SOFC operational conditions has been systematically investigated. The glass–ceramic material with La _(2) O _(3) dopant exhibits good electrical stability under SOFC operational conditions; whereas, a decrease in the conductivity of the CeO _(2) -containing glass–ceramic material can be related to the formation of a conductive phase, i.e. , CeO _(2) . In particular, the relationship between the phase evolution and the change in conductivity of glass–ceramics has been clearly demonstrated. Moreover, the sealing glass–ceramics show good chemical compatibility with 8 mol% yttria-stabilized zirconia (8YSZ) electrolyte, after being held at 750 °C for 1000 hours. The reported results support the suitability of La _(2) O _(3) -containing glass–ceramic as a sealing material for SOFC applications.
机译：尽管稀土氧化物可以改善玻璃陶瓷的密封性能，但是在固体氧化物燃料电池（SOFC）操作条件下这些玻璃陶瓷的电稳定性仍然存在含糊不清。在这项工作中，系统地研究了SOFC操作条件下掺杂有LA _（2）O _（3）或CEO _（2）的玻璃陶瓷的电稳定性。具有LA _（2）O _（3）掺杂剂的玻璃陶瓷材料在SOFC操作条件下表现出良好的电气稳定性;然而，CEO _（2）覆盖玻璃材料的电导率的降低可以与导电相的形成有关，即CEO _（2）。特别地，已经清楚地证明了相位演化与玻璃陶瓷电导率变化之间的关系。此外，密封玻璃陶瓷在750℃保持1000小时后，与8mol％的ytTra稳定的氧化锆（8×10×8）电解质显示出良好的化学相容性。据报道的结果支持La _（2）O _（3）玻璃陶瓷作为SOFC应用的密封材料的适用性。

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