Correlation between High-Temperature Structural Rearrangements and Oxygen Outlet in Perovskite SrCo_0.6Fe_0.2Nb_0.2O_3−z

Abstract:

Strontium cobaltite doped with Fe and Nb, SrCo0.6Fe0.2Nb0.2O3−z, with perovskite-like structure, being one of the promising materials for oxygen permeable membrane implementation, has been investigated via in situ high temperature X-ray powder diffraction on Bruker D8 Advance instrument and high-resolution powder diffraction at synchrotron radiation beamline. The oxygen outlet from the lattice has been found to stay in correlation with the structural rearrangement forming two phases with different oxygen deficiency. The activation energy of phase splitting process has been estimated to be Eactivation ≈ 0.63 ± 0.06 eV.

• Periodical: Solid State Phenomena (Volume 163)
• Pages: 38-41
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.163.38
• Online since: June 2010
• Authors: M.G. Ivanov, A.N. Shmakov, S.V. Tsybulya, O.Yu. Podyacheva, Z.R. Ismagilov
• Keywords: Oxygen Deficiency, Oxygen-Permeable Membrane, Perovskite-Like Oxide, Structural Rearrangement

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