摘要
采用水系流延成型,共烧制备了平板式中温固体氧化物燃料电池(SolidoxidefuelcellSOFC)的NiO/YSZ阳极支撑电解质氧化钇稳定氧化锆(YSZ)薄膜复合体。通过调节优化浆料的pH值、分散剂和粘度获得了具有均匀的微观结构电解质YSZ与阳极NiO/YSZ流延素坯。调节阳极中的YSZ粉体的颗粒级配,以促使阳极坯片的烧成收缩与电解质坯片的烧成收缩相匹配,获得大面积、平整的阳极与电解质复合烧结体,其中阳极层厚度为0.5～1.0mm,孔隙分布均匀,孔隙率达30vol%以上;电解质厚度为15μm以下,相对密度大于98%;阳极与电解质层界面两者能很好地烧结在一起。
Fabrication of planar anode-supported electrolyte layers has been developed by aqueous tape casting and co-sintering processes for intermediate-temperature solid oxide fuel cells （IT-SOFCs）. Graphite and PVP powders were used as pore former and a surfactant, respectively. At pH 9.6, the high-quality green tapes of both the anode and electrolyte layers were prepared by adding 0.8wt% of the dispersant （PAA）. The addition of PVP could prevent carbon powder separating from the matrix and promote homogeneous distribution of carbon powder in the anode slurries. The sintering shrinkage match between the anode and the electrolyte could be achieved by adjusting mass ratio of the fine YSZ to coarse YSZ in the NiO/YSZ anode. The flat and large-size anode-supported electrolyte structure has been successfully fabricated with the anode layer being 0.5～1.0 mm thick above 30vol% porosity,～15um thickness and above 98% relative density for the electrolyte layer.
出处
《陶瓷学报》
CAS
北大核心
2009年第4期438-443,共6页
Journal of Ceramics
基金
国际科技合作项目(编号:2009DFA51210)
江西省自然科学基金(编号:2008GZC0010)资助
关键词
水系流延
共烧
阳极层
电解质层
aqueous tape casting co-firing anode layer electrolyte layer
