Preparation, characterization and thermal expansion of Pr co-dopant in Samarium doped Ceria
The compositions Ce0.8-xSm0.2PrxO2-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℃.It was observed that the thermal expansion increased linearly with increasing temperature for all the samples.
solid oxide fuel cells sol-gel x-ray diffraction scaning electron microscopy thermal expansion
V.Venkatesh V.Prashanth Kumar R.Sayanna C.Vishnuvardhan Reddy
Dept.of Physics Osmania University Hyderabad,INDIA
国际会议
北京
英文
5-8
2012-10-26（万方平台首次上网日期，不代表论文的发表时间）