摘要
研究了应用于固体氧化物燃料电池的BaO-Al2O3-SiO3系封接玻璃性能。通过DSC、XRD、SEM及热膨胀仪等方法,研究了Y2O3含量、热处理温度、时间热处理条件下封接玻璃结构与性能。研究结果表明:随着Y2O3含量的增加,BaO-Al2O3-SiO2封接玻璃,析出的晶体主要是板柱的六方钡长石H-BaAl2Si2O8。玻璃析晶后其微观结构致密,微晶玻璃的热膨胀系数由10.51×10^(-6)·℃^(-1)降低到10.27×10^(-6)·℃^(-1)。Y-1封接玻璃料浆与8YSZ电解质在900℃下热处理2h完成封接,并于820℃下烧结与微晶化10 h,封接玻璃与8YSZ电解质封接界面之间无裂纹、孔洞、反应层的形成,界面结合性能良好。Y-1微晶玻璃在450℃、500℃电阻率为2.27×10~8W·cm、3.71×10~7W·cm。Y-2玻璃在450℃、500℃电阻率为2.21×10~8 W·cm、2.31×10~7 W·cm。
The properties of BaO-Al2 O3-SiO2 sealing glass use in solid oxide fuel cells were studied.The structure and properties of the sealing glass under the conditions of Y2 O3 content,heat treatment temperature and heat treatment time were studied via DSC,XRD,SEM and dilatometer methods.Research indicates:crystallization of BaO-Al2 O3-SiO2 sealing glass are mainly plate-type hexacelsian H-BaAl2 Si2 O8 with the increase of Y203 content.The microstructure of glass becomes densification.The CTE of glassceramics reduce from 10.51×10-6·℃-1 to 10.27×10-6·℃-1.The Y-1 sealing glass slurry and the 8 YSZ electrolyte were heat treated at 900℃for 2 hour to complete sealing and sintered and crystallized at820℃for 10 hour.There are no cracks,holes or reaction layers between the sealing glass and the 8 YSZ electrolyte sealing interface,and bonding properties of interface is fine.The electrical resistivity of Y-1 glass-ceramics at 450℃and 500℃is 2.27×108 W·cm and 3.71×107 W·cm.The electrical resistivity of Y-2 glass-ceramics at 450℃and 500℃is 2.21×108 W·cm and 2.31×107 W·cm.
作者
何峰
郭子琛
曹秀华
任海东
李祖昊
谢峻林
HE Feng;GUO Zichen;CAO Xiuhua;REN Haidong;LI Zuhao;XIE Junlin(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Advanced Materials and Electronic Components,Zhaoqing 526000,China)
出处
《玻璃》
2020年第6期1-7,共7页
Glass
基金
新型电子元器件关键材料与工艺国家重点实验室开放课题资助(FH2018sk201)。
