Abstract
The synthesis and electrical characterisation over a range of oxygen partial pressures (10−20 to 1 atm) are reported for the cubic perovskite niobate-titanates Sr1−x/2Ti1−xNbxO3−δ, which are proposed as potential anode materials for solid oxide fuel cells. Single phase samples were observed for 0≤x≤0.4, and phase purity was retained on annealing at both high and low oxygen partial pressures. Good electrical conductivity was observed on reduction in low oxygen partial pressures, with a maximum for the sample with 25% Nb (x=0.25), σ=5.6 Scm−1 at 930°C (P (O2)=10−18 atm). For dense samples the higher the Nb content the more resistant the reduced sample was to reoxidation as the oxygen partial pressure was increased.
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Irvine, J.T.S., Slater, P.R. & Wright, P.A. Synthesis and electrical characterisation of the perovskite niobate-titanates, Sr1−x/2Ti1−xNbxO3−δ . Ionics 2, 213–216 (1996). https://doi.org/10.1007/BF02376024
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DOI: https://doi.org/10.1007/BF02376024