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The paper reports on effect of doping Ag+, Ni2+, Ca2+, Ba2+ or Zr4+ in La0.1Sr0.9Co0.9Fe0.1O3−δ (LSCF1991) on its oxygen sorption capacity and desorption rate. The dopant can be incorporated into LSCF1991 matrix causing lattice expansion. The oxygen sorption capacity and tendency for the disordered perovskite to ordered brownmillerite phase transition for these samples decrease in the order: LSCF1991...
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