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@ARTICLE{Guo:30052,
      author       = {Guo, X. and Zhang, Z.},
      title        = {{G}rain size dependent grain boundary defect structure:
                      case of doped zirconia},
      journal      = {Acta materialia},
      volume       = {51},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-30052},
      pages        = {2539 - 2547},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The electrical properties of 3 $mol\%$ Y2O3 doped ZrO2 were
                      measured by impedance spectroscopy as a function of grain
                      size, and the microstructure studied by SEM and HREM. In
                      spite of the very clean grain boundaries, the grain boundary
                      conductivity was still found to be similar to2 orders of
                      magnitude lower than the bulk conductivity, while it
                      increased with decreasing grain size. The low grain boundary
                      conductivity, according to the Schottky barrier model, is
                      due to the depletion of oxygen vacancies in the grain
                      boundary space charge layers. Within this framework, the
                      grain boundary space charge potential and the concentration
                      of oxygen vacancies in the space charge layers were
                      calculated; it was found that the space charge potential
                      decreased, but the oxygen vacancy concentration increased
                      with decreasing grain size. Analyses of literature results
                      for 8.2 $mol\%$ Y2O3 and 15 $mol\%$ CaO doped ZrO2,
                      respectively, revealed similar phenomena. (C) 2003 Published
                      by Elsevier Science Ltd on behalf of Acta Materialia Inc.},
      keywords     = {J (WoSType)},
      cin          = {IFF-EKM},
      ddc          = {670},
      cid          = {I:(DE-Juel1)VDB35},
      pnm          = {Kondensierte Materie},
      pid          = {G:(DE-Juel1)FUEK242},
      shelfmark    = {Materials Science, Multidisciplinary / Metallurgy $\&$
                      Metallurgical Engineering},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000182928900009},
      doi          = {10.1016/S1359-6454(03)00052-1},
      url          = {https://juser.fz-juelich.de/record/30052},
}