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@ARTICLE{Guenther:186618,
      author       = {Guenther, Gerrit and Guillon, Olivier},
      title        = {{S}olid state transitions of {B}i$_{2}${O}$_{3}$
                      nanoparticles},
      journal      = {Journal of materials research},
      volume       = {29},
      number       = {12},
      issn         = {2044-5326},
      address      = {Warrendale, Pa.},
      publisher    = {MRS},
      reportid     = {FZJ-2015-00691},
      pages        = {1383 - 1392},
      year         = {2014},
      abstract     = {The solid-state phase transitions of bismuth(III) oxide
                      (Bi2O3) nanoparticles were investigated by complementary
                      methods such as differential scanning calorimetry,
                      differential thermal analysis with combined thermogravimetry
                      and mass spectrometry, and high-temperature x-ray
                      diffraction as compacted nanopowder. At room temperature the
                      particles resided in the β-phase, which is usually a
                      metastable high-temperature phase of bulk Bi2O3. The
                      complementary experimental methods were linked and a
                      nanophase (tetragonal β-phase) → bulk-phase (monoclinic
                      α-phase) transition was identified which was preceded by
                      crystal growth and evaporation of O and C containing
                      species. It was also shown that the atmosphere (more
                      precisely its absolute pressure) has an influence on the
                      transition behavior. An interpretation was proposed that
                      successfully explains all observations from this work and
                      from literature: A sudden destabilization takes place around
                      735 K due to the loss of the stabilizing, carbonized
                      surface. This leads to the observed transformation to the
                      bulk-phase. But if the particles are smaller than a certain,
                      critical size in the nanorange and are not allowed to grow,
                      they remain in the nanophase until they melt.},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {899 - ohne Topic (POF2-899)},
      pid          = {G:(DE-HGF)POF2-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000340188600009},
      doi          = {10.1557/jmr.2014.124},
      url          = {https://juser.fz-juelich.de/record/186618},
}