Abstract
Abstract The samples of La 0.4 Sr 0.6 Co 1− y Fe y O 3− δ ( y = 0.2 and 0.4) were prepared using both conventional ceramic technique and nitrate–citrate precursors technique. The phase identification was made by X-ray diffraction method. The refinement of structural parameters from the XRD and neutron diffraction measurements was performed by full profile Rietveld analysis. Neutron diffraction showed that both samples possess distorted perovskite-type structure. Oxygen nonstoichiometry was measured by chemical analysis and thermogravimetry (TG) analysis in the range 20 ≤ T /°C ≤ 900 and 2E-5 ≤ p O 2 /atm ≤ 4E-1. TG-experiments indicate a relatively fast and reversible oxygen exchange at p O 2 > 1E-2 atm. Mass saturation occurs at T δ increases with increasing temperature and decreasing oxygen partial pressure.
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