Grain-size dependence of the deterioration of oxygen transport for pure and 3 mol% Zr-doped Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ induced by thermal annealing

Grain size, temperature and Zr-substitution are found to influence the performance decay of the mixed-conducting perovskite oxide Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ .