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@PHDTHESIS{Xing:19316,
      author       = {Xing, Ye},
      title        = {{D}evelopment of {T}hin {F}ilm {O}xygen {T}ransport
                      {M}embranes on {M}etallic {S}upports},
      volume       = {130},
      issn         = {1866-1793},
      school       = {Ruhr-Universität Bochum},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-19316},
      isbn         = {978-3-89336-765-8},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {IV, 117 S.},
      year         = {2011},
      note         = {Record converted from JUWEL: 18.07.2013; Ruhr-Universität
                      Bochum, Diss., 2011},
      abstract     = {Asymmetric membrane structure has an attractive potential
                      in the application of O$_{2}$/N$_{2}$ gas separation
                      membrane for the future membrane-based fossil fuel power
                      plant using oxyfuel technology, which will reduce the carbon
                      dioxide emission. The aim of this study is the development
                      of a metal supported multi-layer membrane structure with a
                      thin film top membrane layer and porous ceramic interlayers.
                      Four perovskite materials were studied as candidate membrane
                      materials. Material properties of these perovskite materials
                      were investigated and compared.
                      La$_{0.58}$Sr$_{0.4}$Co$_{0.2}$Fe$_{0.8}$O$_{3-\delta}$
                      (LSCF58428) showed sufficient oxygen permeability, an
                      acceptable thermal expansion coefficient and a moderate
                      sintering temperature. Alternatively,
                      Ba$_{0.5}$Sr$_{0.5}$Co$_{0.8}$Fe$_{0.2}$O$_{3-\delta}$
                      (BSCF5582) is considered obtaining very high oxygen
                      permeability but a higher thermal expansion and a lower
                      thermal stability than LSCF58428. Four different Ni-based
                      alloys were studied as candidate substrate materials in the
                      asymmetric membrane structure. The chromia-scale alloys
                      (Hastelloy X, Inconel 600 and Haynes 214) caused Cr
                      poisoning of the membrane layer material LSCF58428 during
                      high-temperature co-firing in air. NiCoCrAlY with a high Al
                      content (12.7 wt\%) was found to be the most promising
                      substrate material. It showed a good chemical compatibility
                      with perovskite materials at high temperatures. In order to
                      bridge the highly porous substrate and the thin top membrane
                      layer interlayers were developed. Two interlayers were
                      coated by screen printing on the porous NiCoCrAlY substrate
                      which was sintered at 1225°C in flowing H2 atmosphere.
                      Screen printing pastes were optimized by investigating
                      various solvent and binder combinations and various ceramic
                      powder contents. The first interlayer significantly improved
                      the surface quality and the surface pore size has been
                      reduced from 30-50$\mu$m on the substrate to few $\mu$m on
                      the first interlayer, though it comprised some cracks. The
                      second interlayer had a crack-free and porous structure. The
                      top membrane layer was deposited by physical vapor
                      deposition (magnetron sputtering) with a thickness of 3.8
                      $\mu$m improving the gastightness considerably but showing
                      still reasonable air-leakage. Summarizing, the successful
                      development of a metal-perovskite-composite could be shown,
                      which acts as a basis for a further development of a
                      gas-tight metal supported oxygen transport asymmetric
                      membrane structure.},
      cin          = {IEK-1},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/19316},
}