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Ba0.5Sr0.5Co0.8Fe0.2O3-σ(BSCF), a new cathode material for solid oxide fuel cell (SOFC), was synthesized by polyacrylicacid (PAA) method. The lattice structures of samples calcined at different temperatures were characte-rized by XRD. Shrinkage, porosity and pore size of the porous BSCF as a function of sintering temperature were investigated. It was found that the cubic perovskite structure could be formed after calcination at 800 ℃ for 2 h, but not well crystallized as seen from some unknown phases, and the pure cubic perovskite structure was formed after calcination at 1 150 ℃ for 2 h. The particle size of BSCF was less than 1~2 μm. The shrinkage of the porous BSCF increased with sintering temperature, but the opposite was true for the porosity. After sintering at 1 100 ℃ for 4 h, the porous BSCF was still in an appropriate structure, with porosity of 29% and electrical conductivity above 400 S·cm-1.
Ba0.5Sr0.5Co0.8Fe0.2O3-σ (BSCF), a new cathode material for solid oxide fuel cell (SOFC), was synthesized by polyacrylicacid (PAA) method. The lattice structures of samples calcined at different temperatures were characte- rized by XRD. Shrinkage, porosity and pore size of sintering temperature were investigated. It was found that the cubic perovskite could could be formed after calcination at 800 ° C for 2 h, but not well crystallized as seen from some unknown phases, and the pure cubic perovskite structure was formed after calcination at 1 150 ° C for 2 h. The particle size of BSCF was less than 1-2 μm. The shrinkage of the porous BSCF increased with sintering temperature, but the opposite was true The porous BSCF was still in an appropriate structure, with a porosity of 29% and electrical conductivity above 400 S · cm-1.