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@ARTICLE{SchulzeKppers:200909,
      author       = {Schulze-Küppers, F. and ten Donkelaar, S. F. P. and
                      Baumann, S. and Prigorodov, P. and Sohn, Y. J. and
                      Bouwmeester, H. J. M. and Meulenberg, W. A. and Guillon,
                      Olivier},
      title        = {{S}tructural and functional properties of
                      {S}r{T}i$_{1−x}${F}e$_{x}${O}$_{3−δ}$ (0⩽x⩽1) for
                      the use as oxygen transport membrane},
      journal      = {Separation and purification technology},
      volume       = {147},
      issn         = {1383-5866},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-03262},
      pages        = {414 - 421},
      year         = {2015},
      abstract     = {Perovskitic oxides are widely investigated as oxygen
                      transport membrane materials for the efficient generation of
                      pure oxygen or the use in membrane reactors. However, most
                      of high performance perovskites suffer from low stability in
                      operation conditions. Therefore, solid solutions of
                      SrTi1−xFexO3−δ (STF) are investigated due to the
                      initial high stability of the strontium titanate host
                      lattice. Self-synthesized powders with substitution of Ti by
                      $0\%,$ $25\%,$ $35\%,$ $50\%,$ $75\%,$ and $100\%$ Fe were
                      studied. Crystal structure, functional properties i.e.,
                      diffusion coefficient, surface exchange rates, and oxygen
                      permeation rates as well as membrane fabrication and
                      operation related material properties i.e. sintering
                      behaviour and thermal/chemical expansion were investigated.
                      Substitution of Ti by Fe increases oxygen mobility and,
                      hence, oxygen permeation rates, but reduces stability in
                      operation relevant atmospheres such as $Ar/4\%H2$ or CO2. At
                      the same time thermal/chemical expansion increases. This
                      makes the fabrication of supported thin membranes and their
                      integration into membrane modules more challenging. It
                      turned out that $25–35\%$ Fe substituting Ti seems to be a
                      good compromise between structural and functional
                      properties. Oxygen permeation rates achieved are comparable
                      to that of standard materials such as
                      La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF). At the same time
                      stability is higher and thermal expansion coefficients lower
                      compared to LSCF, which makes STF with limited Fe-content
                      (max. $35\%)$ a promising oxygen transport membrane
                      material.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000356553300047},
      doi          = {10.1016/j.seppur.2014.12.020},
      url          = {https://juser.fz-juelich.de/record/200909},
}