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A 2−α A′ α MO 4 (A=Pr, Sm, A′=Sr, M=Ni, Mn) with K 2 NiF 4 -type structure were synthesized by solid reaction. Their chemical stability, electrical conductivity and thermal expansion behavior as well as cathodic polarization were investigated in relation to the cathode of SOFC. The results showed that A 2−α A′ α MO 4 exhibited a low reactivity...
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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