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@ARTICLE{Deibert:202571,
      author       = {Deibert, Wendelin and Ivanova, Mariya and Meulenberg,
                      Wilhelm A. and Vassen, Robert and Guillon, Olivier},
      title        = {{P}reparation and sintering behaviour of
                      {L}a$_{5.4}${WO}$_{12−δ}$ asymmetric membranes with
                      optimised microstructure for hydrogen separation},
      journal      = {Journal of membrane science},
      volume       = {492},
      issn         = {0376-7388},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2015-04770},
      pages        = {439 - 451},
      year         = {2015},
      abstract     = {La5.4WO12−δ (LaWO) is a promising membrane candidate for
                      a variety of H2-related applications due to its appreciable
                      levels of mixed proton–electron conduction and its
                      stability in moist reducing atmospheres at elevated
                      temperatures. Governed by Wagner theory, the H2 permeation
                      performance of a membrane can be enhanced by reducing its
                      thickness. Therefore, the present work deals with preparing
                      LaWO supported membranes with reduced thickness and
                      optimised microstructure. Combining a dense membrane with a
                      porous supporting layer is associated with mismatched
                      sintering rates, which ultimately lead to bending effects.
                      Therefore, the sintering behaviour of both the dense
                      membrane and the porous substrate must be carefully adjusted
                      to each other. For this purpose, single and co-fired
                      membrane and substrate layers were produced by tape casting.
                      Sintering experiments were carried out with an optical
                      dilatometer. The shrinkage and microstructural evolution of
                      the layers were evaluated in terms of the anisotropic
                      shrinkage forces and the membrane rigidness counteracting
                      the substrate shrinkage. The results were used to develop
                      asymmetric LaWO membranes with optimal microstructure. High
                      membrane density was combined with a substrate porosity of
                      $~30\%$ and minimised bending (40 µm). The LaWO
                      membrane–substrate assembly displayed a He leakage of
                      10−5 hPa dm³ cm−2 s−1, which is a value that
                      satisfies further practical demands.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
                      Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000358433600048},
      doi          = {10.1016/j.memsci.2015.05.065},
      url          = {https://juser.fz-juelich.de/record/202571},
}