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Double B perovskite-type series in the system La 0.6 Ca 0.4 Mn 1−x Me x O 3−δ with MeFe, Co, Ni and x=0–0.6 were synthesized in air by solid state reactions at 1200 °C from simple oxides and CaCO 3 . Almost single phase compositions with small impurities (3–5%) were formed. Replacement of Mn with Me-cations is accompanied by a considerable decrease of...
Oxygen non-stoichiometry and electrical conductivity of the Pr 2−x Sr x NiO 4±δ series with x=0.0–0.5 were investigated in Ar/O 2 (pO 2 =2.5 to 21000 Pa) within a temperature range of 20–1000 °C. The equilibrium values of oxygen non-stoichiometry and electrical conductivity of these nickelates were determined as functions of temperature and oxygen partial pressure...
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