TITLE:
Preparation, Characterization and Thermal Expansion of Pr Co-Dopant in Samarium Doped Ceria
AUTHORS:
V. Venkatesh, V. Prashanth Kumar, R. Sayanna, C. Vishnuvardhan Reddy
KEYWORDS:
Solid Oxide Fuel Cells; Sol-Gel; X-Ray Diffraction; Scaning Electron Microscopy; Thermal Expansion
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.2 No.4B,
January
9,
2013
ABSTRACT: The compositions Ce0.8-xSm0.2O2-δ(X=0, 0.02, 0.04, 0.06) were prepared through the sol–gel route. The effect of Pr addition on the crystal structure, densification and thermal expansion of Ce0.8Sm0.2O2-δ was studied. The phase identification and morphology was studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). X-ray diffraction analysis showed that all the samples exhibit a fluorite structure. The lattice parameters were determined by X-ray powder diffraction. Lattice parameters and volume of the unit cell increases with Pr doping. Density of the all samples is more than 90% of theoretical density. The thermal expansion was measured using dilatometric technique in the temperature range 30–1000°C. It was observed that the thermal expansion increased linearly with increasing temperature for all the samples.