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The effect of transition metal oxides (TMOs) CoO1.5, FeO1.5 and MnO2 addition on Ce0.9Sm0.05Nd0.05O1.95 was studied. The crystal structures, microstructures, thermal expansion and electrical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), dilatometer and AC impedance spectroscopy,respectively. The results show that the TMOs addition remarkably promotes the densification of Ce0.9Sm0.05Nd0.05O1.95 and reduces the sintering temperature by ~150 ℃. The samples with TMOs addition sintered at 1450 ℃ exhibit higher conductivities than those sintered at 1500 ℃. The maximum conductivity of 0.040 s.cm-1 at 700 ℃ was achieved with 1 mol% FeO1.5 doping when sintered at 1450 ℃. In addition, the thermal expansion was linear for all the samples. The doping of TMOs does not appreciably change thermal expansion coefficient.


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Effect of transition metal oxides doping on Ce0.9Sm0.05Nd0.05O1.95 solid electrolyte materials

Show Author's information Ming ZHOULin GEHan CHENLucun GUO*( )
College of Materials Science and Engineering, Nanjing University of Technology, No.5 Xinmofan Road, Nanjing, 210009, China

Abstract

The effect of transition metal oxides (TMOs) CoO1.5, FeO1.5 and MnO2 addition on Ce0.9Sm0.05Nd0.05O1.95 was studied. The crystal structures, microstructures, thermal expansion and electrical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), dilatometer and AC impedance spectroscopy,respectively. The results show that the TMOs addition remarkably promotes the densification of Ce0.9Sm0.05Nd0.05O1.95 and reduces the sintering temperature by ~150 ℃. The samples with TMOs addition sintered at 1450 ℃ exhibit higher conductivities than those sintered at 1500 ℃. The maximum conductivity of 0.040 s.cm-1 at 700 ℃ was achieved with 1 mol% FeO1.5 doping when sintered at 1450 ℃. In addition, the thermal expansion was linear for all the samples. The doping of TMOs does not appreciably change thermal expansion coefficient.

Keywords:

transition metal oxides, microstructure, thermal expansion, ionic conductivity
Received: 26 August 2011 Accepted: 14 December 2011 Published: 08 September 2012 Issue date: June 2012
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Publication history

Received: 26 August 2011
Accepted: 14 December 2011
Published: 08 September 2012
Issue date: June 2012

Copyright

© The author(s) 2012

Acknowledgements

We acknowledge support of Jiangsu Provincial Key Laboratory of Inorganic and Composite Materials.

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