SOFC Anode Support Green Tapes Prepared by Tape Casting Technique
流延法制备SOFC阳极支撑体基片

Effects of the main factors which control the slurry rheological behavior and green tape quality of the tape cast SOFC anode support, including ball-milling time, organic solvent type, dispersant addition, plasticizer/binder ratio (R), and defoaming process as well, were systematically investigated. It is found the mixed solvent of ethanol and xylene (1:1 volume ratio) has the optimized wetting capability on the used ceramic powders, improving the suspensibility of powders and the rheology of slurry; the viscosity of the slurry decreases with addition of the dispersant and reaches the minimum at 1.8wt% of dispersant concentration; ball-milling reduces the slurry viscosity which approaches its lower limit after 24h of milling; the slurry viscosity decreases sharply with increase of the R value, and a minimum is obtained at R=1, the rheological behavior of the slurry is significantly improved; deforming agent and vacuum with agitation are effective on air bubble elimination.