中文摘要：

采用高温熔融法制备了用于固体氧化物燃料电池的一系列SrCO3-Al2O3-SiO2（SAS）系统玻璃陶瓷材料。通过调节封接材料中的SrCO3的含量可以控制玻璃陶瓷的热膨胀性能。结果表明，SrCO3含量为19．85mol％的玻璃陶瓷密封胶在25～850℃之间的平均热膨胀系数α为12．52×10^-6K^-1，这与La0.8Sr0.2MnO3（LSM）阴极，YSZ电解质和Fe—Cr合金连接体等电池元件之间有良好的热膨胀匹配性。在800～900℃范围内，SAS体系密封胶与上述的电池元件有很好的相容性，该密封胶与LSM和YSZ电解质等电池材料之间有很好界面接合性，并且在电池的工作温度下有很好的热稳定性，在850℃烧结120h以后其失重率基本不再发生变化，在烧结140h后的失重率仅为0．378％。经放电实验检测，该密封材料的封接性能良好，开路电压为1．03V，放电的最大功率密度为183mW／cm^2。结果表明，SrCO2-Al2O3-SiO2系统玻璃陶瓷密封胶可以作为固体氧化物燃料的封接材料。

英文摘要：

The SrCO3-Al2O3-SiO2（SAS） glass-ceramic materials have been investigated as SOFC（solid oxide fuel cells） sealants. Sealants with different thermal expansion coefficient a values were prepared by adjusting the SrCO3 content in the raw materials. In the study, the sealant material which has the α 12.52 × 10^-6K^-1 from 25 ℃ to 850 ℃ achieved the best sealing effect. The first reason for this lies in that the a of the sealant matches well with other components of the cells from 25 ℃ to 900 ℃, including the La0.8Sr0.2MnO3 （LSM） cathode, YSZ electrolyte and the Fe-Cr alloy interconnect. Furthermore, this kind of sealant also maintains a high stability at the operating temperature of the SOFC and its mass loss was only 0.378% after being heat-treated at 800 ℃ for 140 h. According to the test, the cell sealed by this kind of sealant possesses an open voltage of 1.03 V and a power density of 183 mW/cm^2. Thus, this material can work well as a sort of glass-ceramic sealants for SOFCs.