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@ARTICLE{Schmale:14093,
      author       = {Schmale, K. and Grünebaum, M. and Janssen, M. and Baumann,
                      S. and Schulze-Küppers, F. and Wiemhöfer, H.-D.},
      title        = {{E}lectronic conductivity of
                      {C}e(0.8){G}d(0.2-x){P}r(x){O}(2-delta) and influence of
                      added {C}o{O}},
      journal      = {Physica status solidi / B},
      volume       = {248},
      issn         = {0370-1972},
      address      = {Weinheim},
      publisher    = {Wiley-VCH},
      reportid     = {PreJuSER-14093},
      pages        = {314 - 322},
      year         = {2011},
      note         = {The authors would like to thank the German Federal Ministry
                      of Economics and Technology (BMWi) for founding in course of
                      the MEM-OXYCOAL project. We also thank Dr. Lutz Kogel for
                      his engaged contribution to the experimental setup and for
                      developing the applied software packages. This article will
                      be part of the dissertation of Kerstin Schmale.},
      comment      = {Article first published online: 7 OCT 2010},
      booktitle     = {Article first published online: 7 OCT
                       2010},
      abstract     = {Doped ceria and ceria based solid oxide solutions show a
                      unique combination of oxygen ion mobility, electronic
                      conductivity, and high catalytic activity for redox
                      reactions. In this work, the minority conductivity of
                      electrons has been measured directly as a function of the
                      composition of ceria-praseodymia based solid solutions in
                      order to maximize the electronic conductivity without
                      depressing the oxygen ion mobility. The influence of Co as
                      well as the Gd/Pr dopant ratio on the electronic
                      conductivity of ceria-praseodymia pellets was studied for
                      the compositions Ce0.8Gd0.2-xPrxO2-delta (0.05 <= x <= 0.15)
                      with and without an additional Co content of 0.02 with
                      respect to the formula. The Hebb-Wagner polarization
                      technique was used with ion-blocking microcontacts. In the
                      temperature range 700-800 degrees C, the presence of high
                      amounts of praseodymium increases the p-type conductivity by
                      a factor of more than 10 for oxygen partial pressures higher
                      than 10(-10) bar. Co-doped ceria-gadolinia-praseodyinia
                      solid solutions showed a further increase of the electronic
                      conductivities in a partial pressure range where the Co-free
                      materials showed the minimum of the electronic
                      conductivities. It is assumed that the effect of the
                      additional cobalt doping is due to electronic short circuits
                      along the grain boundaries via segregated CoO. (C) 2011
                      WILEY-VCH Verlag GmbH $\&$ Co. KGaA, Weinheim},
      keywords     = {J (WoSType)},
      cin          = {IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000287715600006},
      doi          = {10.1002/pssb.201046365},
      url          = {https://juser.fz-juelich.de/record/14093},
}