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@ARTICLE{Schober:44264,
      author       = {Schober, T. and Ringel, H.},
      title        = {{P}roton {C}onducting {C}eramics: {R}ecent {A}dvances},
      journal      = {Ionics},
      volume       = {10},
      issn         = {0947-7047},
      address      = {Berlin},
      publisher    = {Springer},
      reportid     = {PreJuSER-44264},
      pages        = {391 - 395},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {A general introduction into the field of high temperature
                      ceramic proton conductors (HTPCs) is given. Results of two
                      typical studies involving these HTPCs are discussed. In the
                      first part a study of the processes occurring during water
                      vapor exposure of bulk ceramic proton conductors,
                      BaCe0.9Y0.1O2.95 (BCY10) and BaCe0.8Y0.2O2.9 (BCY20), is
                      presented. A disc of a HTPC was connected to a mass
                      spectrometer in a vacuum system permitting the
                      identification of the species crossing the ceramic-vacuum
                      interface. Exposing the other side of the sample to D2O led
                      to a strong signal of D2O+ after a certain lag time. From
                      these lag times the tracer diffusivity of hydrogen could be
                      determined as a function of temperature. The permeation of
                      steam consisted of two components: a fast component, given
                      by the diffusivities of deuterons (protons), and a slow
                      component, assigned to chemical diffusion of deuterons
                      (protons) coupled to oxygen vacancies. The data also
                      suggested the possibility of participation of even more
                      complex defects in this chemical diffusion. Dilatometry
                      measurements of different specimens of BCY10 and BCY20 also
                      revealed quite clearly this two-phase pattern during
                      protonation. Diffusion measurements on protonic ceramic
                      membranes using (H2O)-O-18 permitted the determination of
                      the tracer diffusivity of oxygen. All of the above
                      measurements were interpreted in the light of the chemical
                      diffusion model developed by Kreuer et al.The second part
                      deals with composites of proton conductors and inorganic
                      compounds such as carbonates, hydroxides, chlorides, and
                      fluorides following the work of B. Zhu. Conductivities of
                      such composites are presented. Nernst potentials of various
                      electrochemical cells with these composites are discussed.},
      keywords     = {J (WoSType)},
      cin          = {IFF-IEM / ZAT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB321 / I:(DE-Juel1)ZAT-20090406},
      pnm          = {Brennstoffzelle},
      pid          = {G:(DE-Juel1)FUEK246},
      shelfmark    = {Chemistry, Physical / Electrochemistry / Physics, Condensed
                      Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000226183700010},
      doi          = {10.1007/BF02377999},
      url          = {https://juser.fz-juelich.de/record/44264},
}