% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Niedrig:278804,
      author       = {Niedrig, Christian and Wagner, Stefan F. and Menesklou,
                      Wolfgang and Baumann, Stefan and Ivers-Tiffée, Ellen},
      title        = {{O}xygen equilibration kinetics of mixed-conducting
                      perovskites {BSCF}, {LSCF}, and {PSCF} at 900°{C}
                      determined by electrical conductivity relaxation},
      journal      = {Solid state ionics},
      volume       = {283},
      issn         = {0167-2738},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-07037},
      pages        = {30-37},
      year         = {2015},
      abstract     = {For an application of mixed ionic-electronic conducting
                      (MIEC) perovskite oxides, e.g., as solid oxide fuel cell
                      (SOFC) cathodes, as high-temperature gas sensors or as
                      oxygen-transport membrane (OTM) materials, the kinetics of
                      oxygen transport is of fundamental importance.A common setup
                      for the determination of the chemical diffusion coefficient
                      Dδ and the surface exchange coefficient kδ is the
                      electrical conductivity relaxation (ECR) method where the
                      conductivity response of an MIEC sample is measured after
                      the ambient oxygen partial pressure pO2 has been abruptly
                      changed using different gas mixtures. In the present study,
                      however, a closed tubular zirconia “oxygen pump” setup
                      was used which facilitates precise pO2 control in a closed
                      sample space with a high resolution at temperatures above
                      700 °C in atmospheres ranging from pure oxygen continuously
                      down to pO2 = 10− 18 bar. Reasonably fast pO2 changes
                      enable an application of the ECR technique on MIEC oxides
                      down to lower partial pressures not easily accessible with
                      gas mixtures.The oxygen transport parameters of dense
                      ceramic bulk samples of Ba0.5Sr0.5Co0.8Fe0.2O3 -δ (BSCF),
                      La0.58Sr0.4Co0.2Fe0.8O3 -δ (LSCF), and
                      Pr0.58Sr0.4Co0.2Fe0.8O3 -δ (PSCF) have been studied as a
                      function of temperature (800 and 900 °C) in the range
                      between 10− 6 ≤ pO2/bar ≤ 0.21. The Dδ and kδ values
                      obtained for LSCF at 800 °C are in good agreement with
                      values from literature, proving the usability of the setup
                      for ECR measurements. For BSCF, LSCF, and PSCF, Dδ and kδ
                      values could be determined for the first time at 900 °C as
                      a function of pO2.},
      cin          = {IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000367113100005},
      doi          = {10.1016/j.ssi.2015.11.004},
      url          = {https://juser.fz-juelich.de/record/278804},
}