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@INPROCEEDINGS{SchulzeKppers:828390,
      author       = {Schulze-Küppers, Falk and Zou, Ying and Balaguer, Maria
                      and Baumann, Stefan and Meulenberg, Wilhelm Albert and
                      Guillon, Olivier},
      title        = {{C}omparison of support microstructures for oxygen
                      transport membranes: freeze-drying vs. tape-casting.},
      reportid     = {FZJ-2017-02351},
      year         = {2017},
      abstract     = {Mixed Oxygen Ion Electron Conducting (MIEC) ceramic
                      membranes for separation of oxygen from gas mixtures (OTM)
                      are of great interest for different applications due to
                      their high efficiency and practically infinite selectivity.
                      Existing high performance membranes consist of a 20-50 µm
                      thick membrane layer on a support with random porosity and
                      varying thickness in the range of 500 – 1000 µm. Those
                      membranes possess high oxygen flux, however, a non-adequate
                      support microstructure can become rate limiting for the gas
                      transfer. The gases may accumulate or deplete at the
                      membrane-support interface due to insufficient gas exchange,
                      which leads to a decrease in driving force across the
                      membrane layer itself. Accordingly, microstructural
                      optimization of the porous support architecture is needed,
                      which involves controlled and tailored porosity, tortuosity,
                      morphology, and pore opening diameter. Freeze drying is one
                      opportunity to obtain hierarchical porous structures that
                      potentially enhance the oxygen flux of the membrane.In this
                      work, membranes with different support architectures are
                      fabricated, i.e. hierarchically organized porous supports
                      via water-based freeze drying and its porosity and membrane
                      layer thickness is mimicked by tape casting for direct
                      comparison. The effect of the support microstructure on
                      oxygen flux and mechanical properties has been studied. The
                      results will help to further improve membrane performance
                      and aid the development of mechanical stable thin film
                      membranes.},
      month         = {Mar},
      date          = {2017-03-19},
      organization  = {92nd DKG Annual Meeting and Symposium
                       on High-Performance Ceramics, Berlin
                       (Germany), 19 Mar 2017 - 22 Mar 2017},
      subtyp        = {After Call},
      cin          = {IEK-1 / IEK-2},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-2-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / GREEN-CC - Graded Membranes for Energy
                      Efficient New Generation Carbon Capture Process (608524) /
                      HITEC - Helmholtz Interdisciplinary Doctoral Training in
                      Energy and Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-113 / G:(EU-Grant)608524 /
                      G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/828390},
}