The rigid nature of sealing glass-ceramics restricts the thermal cycling stability of Solid Oxide Fuel Cells (SOFCs), which thus evokes an interest in designing a sealing glass without crystallization under the operational condition of SOFCs. In this paper, we report that the sealing performance of 30Na₂O-70SiO₂ (in mole%) glass-ceramic can be significantly improved by Fe₂O₃ dopant through a composite approach. In particular, the crystallization in glass can be suppressed by appropriate Fe₂O₃ dopant amount (8 mol%), which results in the improved sealing property of glass. In addition, the glass modified with Fe₂O₃ shows good chemical compatibility with 8 mol% yttria-stabilized zirconia (8YSZ) electrolyte and metallic interconnect (430 stainless steel) in dual atmospheres. The possible mechanism for the improved sealing performance of 30Na₂O-70SiO₂ glass-ceramic by this unique composite approach is also discussed.

密封玻璃陶瓷的刚性限制了固体氧化物燃料电池（SOFC）的热循环稳定性，因此唤起了人们对设计密封玻璃的兴趣，这种密封玻璃在SOFC的工作条件下不会结晶。在本文中，我们报道了Fe ₂ O ₃掺杂剂可以通过复合方法显着改善30Na ₂ O-70SiO ₂（摩尔％）玻璃陶瓷的密封性能。特别地，可以通过适当地添加Fe ₂ O _3的量（8摩尔％）来抑制玻璃中的结晶化，从而可以提高玻璃的密封性。另外，用Fe ₂ O ₃改性的玻璃与8摩尔％的氧化钇稳定的氧化锆（8YSZ）电解质和金属互连件（430不锈钢）在双重气氛中显示出良好的化学相容性。还讨论了通过这种独特的复合方法改善30Na ₂ O-70SiO ₂玻璃陶瓷密封性能的可能机理。