Abstract
Perovskite-type metal oxides with a nominal chemical formula of Nd1-xBaxCo0.8Fe0.2O3-δ (NBCF) (0 ≤ x ≤ 0.7)were prepared by solid-state synthesis method at 1300 °C in air. Powder X-ray diffraction showed that the x =0.25 member is a single-phase perovskite-type Nd0.75Ba0.25Co0.8Fe0.2O3-δ in the Pnma space group and all othermembers were found to be multiphase. All the investigated NBCF compositions show minor reactivity with theSr and Mg-co-doped lanthanum gallate (LSGM) when sintered with 30 wt.% LSGM at 1050 °C but maintaintheir perovskite-type structure. 4-probe DC chronopotentiometry measurements were performed on the sinteredsample pellets. The x = 0.4 member reaches a maximum conductivity of 1068 S/cm at 300 °C in air. Among thesamples studied, the x = 0.55 member exhibits the lowest area specific polarization resistance (ASR) of 0.026 Ωcm2 at 750 °C in air.
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