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@ARTICLE{He:864756,
      author       = {He, Guanghu and Lan, Qianqian and Sohn, Yoo Jung and
                      Baumann, Stefan and Dunin-Borkowski, Prof. Rafal and
                      Meulenberg, Wilhelm A and Jiang, Heqing},
      title        = {{T}emperature-{I}nduced {S}tructural {R}eorganization of
                      {W}-doped {B}a0.5{S}r0.5{C}o0.8{F}e0.2{O}3-δ {C}omposite
                      {M}embranes for {A}ir {S}eparation},
      journal      = {Chemistry of materials},
      volume       = {31},
      number       = {18},
      issn         = {1520-5002},
      address      = {Washington, DC},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2019-04423},
      pages        = {7487-7492},
      year         = {2019},
      abstract     = {The practical use of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF)
                      prototypical oxygen-transport membrane for air separation is
                      currently hampered by the decomposition of the cubic
                      perovskite into a variant with hexagonal stacking at
                      intermediate temperatures of ≤850 °C, which impairs the
                      oxygen transport. Here, we report the development of a
                      W-doped BSCF composite that contains Fe-rich single
                      perovskite (SP) and W-rich double perovskite (DP) phases
                      with different crystallographic parameters. In contrast to
                      BSCF, the BSCFW SP/DP composite maintains its cubic
                      structure at 800 °C for 200 h, demonstrating its structural
                      stability at intermediate temperatures. We use X-ray
                      diffraction, scanning electron microscopy, and
                      high-resolution transmission electron microscopy to show
                      that the enhanced phase stability of the composite is
                      associated with a temperature-induced SP–DP dynamic
                      interaction, which involves W and Fe interdiffusion between
                      the SP and DP phases, dynamically adjusting the chemical
                      composition and limiting structural distortion and new phase
                      formation. The composite exhibits a stable permeation
                      performance in the oxygen-transport membrane during over 150
                      h operation at 800 and 700 °C, confirming the potential of
                      intermediate-temperature oxygen-transport membranes for air
                      separation and providing insight for designing thermally
                      stable composite oxides.},
      cin          = {IEK-1},
      ddc          = {540},
      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:000487859200042},
      doi          = {10.1021/acs.chemmater.9b02213},
      url          = {https://juser.fz-juelich.de/record/864756},
}