Abstract
Homogeneous fine grained La 2(Zr,Y) 2O 7/LaCoO 3â δ -based composite materials were obtained from simple mixture of the components and solid state reaction between LaCoO 3â δ and yttria-stabilized zirconia. Thermal expansion data can be fitted to simple mixture rules to predict the composite behavior from the properties of the individual components. The dependence of total and ionic conductivity on the volume fraction of the conductive phase can be described by the General Effective Media equation. The resistance to thermal cycling was evaluated and found satisfactory
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