| dc.description.abstract | Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ(0.0≦x≦0.2) proton-conducting oxides
had been successfully prepared using a solid state reaction method. In this study,
the effect of indium contents on the microstructures, chemical stability, electrical
conductivity, and sintering ability of these Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ oxides
were systemically studied by using X-ray diffraction (XRD), scanning electron
microscopy, and two point probe conductivity analysis. The XRD results showed
that no second phase could be resolved from the Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ
oxides sintered at 1450 °C for 4 hr. Meanwhile, the SEM observation shows a
dense surface morphology for these oxides after sintering at 1450 °C for 4 hr. The
optimum conductivity can reach to 0.011 S/cm at 800 °C occurs at the oxide
composition of Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ. In addition, the chemical stability to
resist CO2 at 600 °C can be effectively improved by doping more than 0.1 at%
indium. Therefore, the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ ceramic is suggested to be a
potential electrolyte material for P-SOFC applications. In addition, the anodesupported
half-cell was prepared by spray coating the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-
δ electrolyte slurry on the anode pellet , and sintered at 1450 °C for 4 hour. Then
the sintered half-cell was coated with Pt paste as cathode for I-V curve testing.
Keywords: SOFC, sinterability, conductivity, chemical stability, electrolyte,
IndiumBa0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ(0.0≦x≦0.2) proton-conducting oxides
had been successfully prepared using a solid state reaction method. In this study,
the effect of indium contents on the microstructures, chemical stability, electrical
conductivity, and sintering ability of these Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ oxides
were systemically studied by using X-ray diffraction (XRD), scanning electron
microscopy, and two point probe conductivity analysis. The XRD results showed
that no second phase could be resolved from the Ba0.8Sr0.2Ce0.6Zr0.2InxY0.2-xO3-δ
oxides sintered at 1450 °C for 4 hr. Meanwhile, the SEM observation shows a
dense surface morphology for these oxides after sintering at 1450 °C for 4 hr. The
optimum conductivity can reach to 0.011 S/cm at 800 °C occurs at the oxide
composition of Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ. In addition, the chemical stability to
resist CO2 at 600 °C can be effectively improved by doping more than 0.1 at%
indium. Therefore, the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-δ ceramic is suggested to be a
potential electrolyte material for P-SOFC applications. In addition, the anodesupported
half-cell was prepared by spray coating the Ba0.8Sr0.2Ce0.75In0.05Y0.2O3-
δ electrolyte slurry on the anode pellet , and sintered at 1450 °C for 4 hour. Then
the sintered half-cell was coated with Pt paste as cathode for I-V curve testing.
Keywords: SOFC, sinterability, conductivity, chemical stability, electrolyte,
Indium | en_US |