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@ARTICLE{Rheinheimer:887826,
      author       = {Rheinheimer, Wolfgang and Phuah, Xin Li and Wang, Han and
                      Lemke, Fabian and Hoffmann, Michael J. and Wang, Haiyan},
      title        = {{T}he role of point defects and defect gradients in flash
                      sintering of perovskite oxides},
      journal      = {Acta materialia},
      volume       = {165},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-04452},
      pages        = {398 - 408},
      year         = {2019},
      abstract     = {The present study investigates the impact of point defects
                      and their redistribution on the flash sintering process.
                      Strontium titanate was chosen as a model system for the
                      group of perovskite ceramics. The characteristics of flash
                      sintering of strontium titanate were analyzed with different
                      acceptor dopant concentrations. The onset of flash sintering
                      was found to be dependent on the acceptor dopant
                      concentration, as expected by the increasing conductivity. A
                      gradient in the microstructure was found after flash
                      sintering with larger grain sizes at the negative electrode.
                      TEM-EDS measurements indicated Ti enrichment at the positive
                      electrode for undoped strontium titanate and strong acceptor
                      segregation for doped strontium titanate. In contrast, grain
                      boundaries at the negative electrode were found to be
                      stoichiometric for the undoped case and the acceptor
                      segregation was less obvious for the doped case.},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000457665100036},
      doi          = {10.1016/j.actamat.2018.12.007},
      url          = {https://juser.fz-juelich.de/record/887826},
}