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@ARTICLE{LEMKE:887838,
      author       = {LEMKE, Fabian and RHEINHEIMER, Wolfgang and HOFFMANN,
                      Michael J.},
      title        = {{S}intering and grain growth in {S}r{T}i{O}3: impact of
                      defects on kinetics},
      journal      = {Journal of the Ceramic Society of Japan},
      volume       = {124},
      number       = {4},
      issn         = {1348-6535},
      address      = {Tokyo},
      publisher    = {Soc.},
      reportid     = {FZJ-2020-04464},
      pages        = {346 - 353},
      year         = {2016},
      abstract     = {The microstructural evolution of undoped and iron doped
                      SrTiO3 is analyzed during sintering at 1280°C in air and
                      reducing atmosphere. The focus is on densification and grain
                      growth during different holding times investigated by
                      dilatometric studies and microstructural analysis. The
                      sintering equations developed by Coble are used to
                      characterize sintering. The influence of point defects on
                      diffusion, densification and grain growth is evaluated using
                      basic defect chemistry equations. A space charge concept at
                      the grain boundaries is added to bulk defect chemistry
                      concepts to understand sintering of perovskites, since the
                      major part of mass transport during sintering occurs in this
                      region. The extension of the defect chemistry concept allows
                      to explain the change in diffusion mechanism during
                      sintering (grain boundary diffusion or bulk diffusion) as
                      well as grain growth stagnation observed in iron doped
                      SrTiO3. The results are used to separate the complex
                      interplay of densification and grain growth. While grain
                      growth decreases with increasing defect concentration, no
                      clear trend is observed for the densification kinetics,
                      since both grain growth and diffusion are relevant. The
                      results show that grain growth during sintering provides
                      comparable results to grain growth experiments in dense
                      SrTiO3 and, thus, pore drag seems not to be important. The
                      calculated diffusion coefficients are in good agreement with
                      literature data and show a strong dependency on the
                      concentration of strontium vacancies.},
      cin          = {IEK-1},
      ddc          = {660},
      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:000379610100012},
      doi          = {10.2109/jcersj2.15265},
      url          = {https://juser.fz-juelich.de/record/887838},
}