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@ARTICLE{Ran:865076,
      author       = {Ran, Ke and Deibert, Wendelin and Du, Hongchu and Park,
                      Daesung and Ivanova, Mariya E. and Meulenberg, Wilhelm A.
                      and Mayer, Joachim},
      title        = {{P}rocessing-induced secondary phase formation in
                      {M}o-substituted lanthanum tungstate membranes},
      journal      = {Acta materialia},
      volume       = {180},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-04638},
      pages        = {35 - 41},
      year         = {2019},
      abstract     = {The compositional homogeneity of a technically relevant
                      hydrogen separation membrane, La5.4W0.8Mo0.2O12-δ
                      (LWO-Mo20), was studied using comprehensive transmission
                      electron microscopy (TEM) techniques. The membrane is
                      predominantly composed of dense LWO-Mo20 grains with a
                      defect fluorite structure. In addition to the primary phase,
                      the observed secondary phase (SP) grains were identified as
                      La2/3(Mg1/2W1/2)O3, with the W sites partially occupied by
                      Mo, Fe and Al. Part of the SP grains were incorporated into
                      single LWO-Mo20 grains through smart orientations, in which
                      massive structural defects at the interface of the LWO-Mo20
                      and SP grains are efficiently avoided. Slight elemental
                      disorder is limited within a few atomic layers. In contrast,
                      the LWO-Mo20 grains share barely common features with
                      neighboring SP grains, and are unstable under electron beam
                      irradiation. The formation of the SP was tracked back to the
                      traces of impurities in the precursors. Excluding such
                      impurities is technically challenging and unacceptable in
                      terms of cost. Hence, our results here show an opportunity
                      to remedy these impurities through engineering the SP into
                      individual primary grains, in which even a significant cost
                      reduction could thus be realized.},
      cin          = {IEK-1 / ER-C-2},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)ER-C-2-20170209},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / DFG project 167917811 - SFB 917: Resistiv
                      schaltende Chalkogenide für zukünftige
                      Elektronikanwendungen: Struktur, Kinetik und
                      Bauelementskalierung "Nanoswitches" (167917811)},
      pid          = {G:(DE-HGF)POF3-113 / G:(GEPRIS)167917811},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000495519100005},
      doi          = {10.1016/j.actamat.2019.08.053},
      url          = {https://juser.fz-juelich.de/record/865076},
}