Solid Solubility,Raman Spectra and Electrical Property of the Solid Solutions Ce1‐xNdxO2‐δ by Sol‐gel Route |
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Authors: | Xiao‐Min Lin Li‐Ping Li Guang‐She Li Wen‐Hui Su |
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Abstract: | Ce1‐xNdxO2‐δ (x = 0.05–0.55) solid solutions prepared by sol‐gel route were crystallized in a cubic fluorite structure. The solid limit was determined to be as high as x = 0.45. Raman spectra of the solid solutions with lower composition exhibited only one band, which was assigned to F2g mode. Increasing composition produced broad and asymmetric F2g mode with an appearance of low frequency tail. The new broad peak observed at higher frequency side of the F2g mode associated with the oxygen vacancy in the lattice. The impedance spectra of the solid solutions showed definitely ionic conduction, and Ce0.80Nd0.20O2‐δ solid solution possessed a maximum conductivity. At 500 °C, the conductivity and activation energy were 2.65 × 10?3S/cm and 0.82 eV, respectively. |
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Keywords: | Ce1‐xNdxO2‐δ Raman spectrum ionic conductivity |
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