p(O2)-stability of LaFe1−xNixO3−δ solid solutions at 1100 °C

LaFe1−xNixO3−δ (x=0.1−1.0) perovskites were synthesized via citrate route. The p(O2)-stability of the perovskite phases LaFe1−xNixO3−δ has been evaluated at 1100 °C based on the results of XRD analysis of powder samples annealed at various p(O2) and quenched to room temperature. The isothermal LaFeO3−δ–“LaNiO3−δ” cross-section of the phase diagram of the La–Fe–Ni–O system has been proposed in the range of oxygen partial pressure −15