关键词: NiO/YSZ阳极;凝胶注模工艺;凝胶固化;干燥工艺;烧结工艺

Abstract: The NiO/YSZ anode materials made by gel-casting process is one of the hot-spot in the areas of solid oxide fuel cell (SOFC). The effects of initiator and catalyst related to gelation time, temperature to weight loss of green, solid loading percent, type and amount of pore former to the shrinkage of samples and the conductivity of reduced anode were investigated in this paper. The samples were characterized by SEM and EDS. The results show that with 5wt% initiator 2.0 mL and 0.5vol% catalyst 1.0 mL in the 100 mL slurry, the gel time of samples could be controlled within 20 minutes. The best suitable drying temperature of green is 25 ℃. The 45vol% solid loading percent, 15wt% graphite as a pore former, sintering at 1350 ℃, the shrinkage of anode green is matched to that of YSZ. The conductivity of Ni/YSZ anode reduced is 800 S/cm at 600-800 ℃, which could meet the requirement of the conductivity as anode in SOFC.

Key words: NiO/YSZ anode%gel-casting%gelation%dry%sintering process