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@INPROCEEDINGS{Ivanova:902059,
      author       = {Ivanova, Mariya and Balaguer, Maria and Jalarvo, Niina and
                      Fantin, Andrea and Menzler, Norbert H. and Guillon, Olivier},
      title        = {{Y} and {M}n substituted {B}a{Z}r{O}3 ceramics: material
                      properties as a function of the substituents concentration},
      reportid     = {FZJ-2021-04007},
      year         = {2021},
      note         = {Key words: mixed proton-electronic ceramic conductors,
                      proton conducting ceramic cells, ceramic membranes for H2
                      separation, B-side double substituted BaZrO3, A(II)B(IV)O3
                      perovskites, BaZr0.8Y0.2-xMnxO3-δ, NEXAFS, QENS},
      abstract     = {Innovations in material science are the key element for
                      solving technological challenges. Various energy and
                      environmental applications require designing materials with
                      tailored compositions, microstructures and specific
                      target-oriented performance. Y and Mn co-substituted BaZrO3,
                      e.g. BaZr0.85Y0.15Mn0.05O3-δ (BZYM5), has previously
                      attracted attention as a membrane material for H2 separation
                      from gas mixture due to its mixed proton-electron
                      conductivity leading to appreciable levels of H2-flux at
                      elevated temperatures and its good thermo-chemical stability
                      under reducing environments. In the present work, we
                      developed ceramic materials within the BaZr0.8Y0.2-xMnxO3-δ
                      series, where x =0.02, 0.05, 0.10, and systematically
                      studied their functional properties in dependence of the
                      Y-to-Mn ratio, including thermal behaviour, hydration and
                      electrical properties. In addition to that, near edge X-ray
                      absorption fine structure spectra (NEXAFS) in the vicinity
                      of O K-edge and Mn L2,3-edges was carried out for selected
                      BZYM specimens to collect information on oxidation states
                      and surrounding symmetry of Mn atoms in surface- and bulk-
                      sensitive modes. Finally, we studied proton diffusion in
                      hydrated BZYM samples using quasi-elastic neutron scattering
                      (QENS). Two distinct dynamic processes were observed at
                      temperatures above 300 °C: one faster more localized
                      process and another slower long-range diffusion process. The
                      long-range diffusion has clear characteristics of
                      jump-diffusion. We will present a model for atomic scale
                      proton diffusion in these materials, and we will further
                      discuss how Mn doping influences the proton diffusion in
                      these materials.},
      month         = {Sep},
      date          = {2021-09-27},
      organization  = {Solid State Proton Conductors 2020,
                       online (Germany), 27 Sep 2021 - 1 Oct
                       2021},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {1213 - Cell Design and Development (POF4-121) /
                      Verbundvorhaben ProtOMem: Entwicklung von protonenleitenden
                      Membranen mit optimierter Mikrostruktur und verbesserten
                      Transporteigenschaften für Energie- und
                      Wasserstoffseparationsanwendungen (03SF0537A)},
      pid          = {G:(DE-HGF)POF4-1213 / G:(BMBF)03SF0537A},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/902059},
}