% 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”.

@PHDTHESIS{Betz:10054,
      author       = {Betz, Michael},
      title        = {{H}erstellung und {C}harakterisierung von
                      sauerstoffionenleitenden {D}ünnschichtmembranstrukturen},
      volume       = {61},
      issn         = {1866-1793},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-10054},
      isbn         = {978-3-89336-618-7},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {61 S.},
      year         = {2010},
      note         = {Record converted from VDB: 12.11.2012; Ruhr-Universität
                      Bochum},
      abstract     = {In power plants using Oxyfuel technology, fossil fuels are
                      combusted with pure oxygen. This leads to carbon dioxide of
                      high purity, which is necessary for its transport and
                      storage. Oxygen separation by means of perovskitic membranes
                      have great potential to decrease the efficiency losses
                      caused by the allocation of the enormous amounts of oxygen.
                      The aim of this work is the preparation and characterisation
                      of thin film membranes on porous substrates and the analysis
                      of their oxygen permeation properties. Therefore the
                      material system
                      A$_{0,68}$Sr$_{0,3}$Fe$_{0,8}$Co$_{0,2}$O$_{3−\delta}$
                      (A68SFC) was analysed, where the A-site was substituted with
                      Lanthanides (La, Pr, Nd, Eu, Sm, Gd, Dy, Er) or alkaline
                      earth metals (Ba, Ca). After an extensive characterisation,
                      the selection was reduced to the substitutions with La, Pr
                      and Nd. Other compounds could not meet the demands with
                      regard to phase purity, chemical stability or extension
                      behaviour. All analyses were conducted in comparison to
                      Ba$_{0,5}$Sr$_{0,5}$Co$_{0,8}$Fe$_{0,2}$O$_{3−\delta}$
                      (BSCF) which is known to exhibit higher permeation rates,
                      but is more sensitive to stability issues. The dependency of
                      permeation rates on membrane thickness or oxygen partial
                      pressures on both membrane surfaces is discussed by means of
                      permeation measurements conducted on bulk BSCF membranes.
                      These cannot be described completely by the Wagner equation.
                      This is due to changes of the driving force originating from
                      influences of the surface reaction kinetics and
                      concentration polarisation on the membrane surface, which
                      are not considered. Porous substrates for asymmetric
                      membranes were manufactured by tape casting and warm
                      pressing. The application of the functional layer was
                      performed via screen printing. Permeation measurements show
                      that the asymmetric structures exhibit higher permeation
                      rates in comparison to bulk membranes with L=1 mm. The
                      moderate increase can be attributed to the low gas
                      permeability of the substrates used.},
      cin          = {IEF-1},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)VDB809},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/10054},
}