Electrical Conductivities of [(ZrO2)<TEX>$_{1-x}$</TEX>(CeO2)<TEX>$_x$</TEX>]<TEX>$_{0.92}$</TEX>(Y<TEX>$_2$</TEX>O<TEX>$_3$</TEX>)<TEX>$_{0.08}$</TEX> Solid Solution

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J. Korean Ceram. Soc. > Volume 35(12); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(12): 1323.

[(ZrO2)$_{1-x}$(CeO2)$_x$$_{0.92}$(Y$_2$O$_3$)$_{0.08}$ 고용체의 전기전도도

이창호, 최경만

포항공과대학교 재료금속공학과

Electrical Conductivities of [(ZrO2)$_{1-x}$(CeO2)$_x$]$_{0.92}$(Y$_2$O$_3$)$_{0.08}$ Solid Solution

ABSTRACT

The electrical conductivities of the yttria (8mol%) stabilizedzirconia-ceria solid solutions were measured as a function of oxygen partial between 80$0^{circ}C$ and 100$0^{circ}C$ using 4-probe d.c. method Under pure oxygen atmosphere the oxygen ionic conductivity of CeO2-ZrO2 decreased with the concentration of CeO2 Under reducing condition electronic conduction due to the redox equilibrium of Ce ion was observed. Total ionic and electronic conductivities fitted by a defect model enabled to determine the electronic transference number(tei) which increased with the concentration of CeO2 and with the degree of reduction.

Key words: Conductivity, Zirconia-Ceria solid solution, Electronic transference number