研究了一种热稳定性好的中温固体氧化物燃料电池密封玻璃. 研究表明, 此密封玻璃的热膨胀系数(室温～631℃)为9.8×10-6/K, 与8YSZ电解质的热膨胀系数10.0×10-6/K(室温～631℃)接近, 并且在700℃热处理300h后, 该密封玻璃的热膨胀系数几乎没有变化. 粘度实验表明, 玻璃在700℃下具有足够的刚性, 适合于运行温度在700℃左右SOFC的密封. 化学相容性的研究显示, 在700℃下与8YSZ反应300h后没有发现显著的界面反应.
A sealing glass, based on the SiO2-B2O3-BaO-La2O3-ZrO2-Y2O3 system, was developed for intermediate temperature solid oxide fuel cells (ITSOFCs). The coefficient of thermal expansion (CTE) of the glass is 9.8×10-6/K (RT～631℃), very close to that of 8YSZ electrolyte. The glass shows a very good thermal stability, even after heat-treatment at 700℃ for 300h, little change in CTE detected. The investigations also reveal that the glass is chemically compatible with 8YSZ electrolyte and no obvious interfacial reaction can be observed after the glass contacting with 8YSZ at 700℃ for 300h.
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