摘要
采用泥浆喷涂工艺制备SOFC用阳极支撑YSZ电解质薄膜,首先采用模压成型工艺制备NiO-YSZ阳极基底,通过优化泥浆制备工艺条件及喷涂条件,在NiO-YSZ阳极基底上喷涂均匀平整的YSZ电解质涂层,进一步采用共烧结工艺使YSZ电解质层致密。通过在基底中添加碳粉造孔剂,调节阳极基底的烧结收缩率与电解质层烧结收缩率一致,避免电解质涂层的开裂和变形。阳极基底中加入5wt%含量的碳粉,阳极与电解质层烧结收缩率一致。扫描电子显微镜观察电解质涂层表面形貌表明,球磨24h的泥浆喷涂的YSZ涂层较好,阳极基底与电解质膜在1400℃烧结2h,电解质膜层致密,表明通过泥浆喷涂工艺可以制备出致密电解质层。
Slurry spray process was used to fabricate the anode-supported YSZ thin electrolyte for solid oxide fuel cells. The flat and homogeneous YSZ electrolyte film coating onto the green NiO-YSZ anode substrate by optimizing the slurry fabrication and spray condition and co-fired step were carried out to make the electrolyte density. The shrinkage rate of anode substrate was adjusted to match with that of electrolyte agglomeration with additions of pore former in order to avoid cracking and distortion of YSZ electrolyte film and substrate due to possible stress induced by differential shrinkage during the co-firing step. Scanning electron microscope observation revealed that YSZ electrolyte with slurry spraying of 24 h ball grinding was good and the dense electrolyte layer was obtained after sintering step of 1400℃ for 2h, which shows the feasibility of fabrication of anode supported dense electrolyte layer by slurry spray technique.
出处
《材料导报》
EI
CAS
CSCD
2004年第10期91-93,共3页
Materials Reports
基金
国家863课题资助(2001AA515080)
