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- W1548859894 abstract "The stability of the solid oxide fuel cell (SOFC) cathode material in -containing atmospheres is investigated by precision thermogravimetry (TG) and mass spectrometry (MS) as a function of temperature . The desorption of and from samples with different pretreatments is compared. Oxygen exchange at is significantly impaired by -containing atmospheres. At the kinetics of carbonate formation in -rich atmosphere is described by a linear-parabolic rate law. A pronounced dependence of the rate constant on the content is suggested. Temperature cycles at and bar, which show effects due to oxygen exchange of the perovskite and due to , are analyzed based on reference experiments in a -free atmosphere, and under consideration of the TG-MS results. The decomposition temperature of the carbonate in contact with an atmosphere of bar amounts to . Complementary, the impact of carbonate formation on the oxygen exchange kinetics is investigated by conductivity relaxation measurements. A severe degradation of the surface oxygen exchange coefficient is observed after of exposure to ambient air. Regeneration and activation of the oxygen exchange kinetics is demonstrated after treatment in a -free atmosphere at ." @default.
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- W1548859894 date "2008-01-01" @default.
- W1548859894 modified "2023-10-16" @default.
- W1548859894 title "Stability of the SOFC Cathode Material (Ba,Sr)(Co,Fe)O[sub 3−δ] in CO[sub 2]-Containing Atmospheres" @default.
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- W1548859894 doi "https://doi.org/10.1149/1.2981024" @default.
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