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Effect of Co Co-Doping on the Electrical Conductivity of Ce_0.9Sm_0.1O_2-δ

M.J. Pawar, S.S. Chaure, S.B. Deshmukh

Journal of Ceramic Science and Technology, Vol. 1, No. 1 (2010), pp. 27-31

DOI: 10.4416/JCST2010-00006

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Abstract

The influence of cobalt doping on the densification and activation energy of Ce0.9Sm0.1O2-δ was studied. Solid solutions of Ce0.9-xCoxSm0.1O2-δ (x = 0, 0.05, 0.1 and 0.15) were prepared by means of a modified EDTA-glycol method. It was found that the degree of densification increases with an increasing concentration of cobalt. Almost full densification could be achieved at a sintering temperature of 1500 °C. The highest density (99.3 %) and minimum activation energy (0.81 eV) were observed for the composition Ce0.8Co0.1Sm0.1O2-δ.

Keywords

SOFC; ceria; EDTA-glycol method; co-dopant; solid electrolytes

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