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@ARTICLE{Sadykov:151425,
      author       = {Sadykov, S. and , Okhupin. Yu. and Yeremeev, N. and
                      Vinokurov, Z. and Shmakov, A. and Belyaev, V. and Uvarov, N.
                      and Mertens, Josef},
      title        = {{I}n situ {X}-ray diffraction studies of {P}r2 −
                      x{N}i{O}4 + δ crystal structure relaxation caused by oxygen
                      loss},
      journal      = {Solid state ionics},
      volume       = {13292},
      issn         = {1872-7689},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2014-01378},
      pages        = {5},
      year         = {2014},
      abstract     = {Fine powders of Pr2 − xNiO4 + δ (PNO) oxides (x=0÷0.3)
                      synthesized by Pechini routewere uniaxially pressedinto
                      pellets and sintered at 1300 °C under air. Chemical
                      diffusion coefficients (Dchem.) and surface exchange
                      constants(kchem.) were estimated by analysis of the weight
                      and conductivity relaxations after step-wise change ofpO2.
                      In situ XRD studies were carried out in VEPP-3 facilities of
                      the Siberian Center of Synchrotron Radiationusing unique
                      high-temperature camera and procedures.Analysis of dynamics
                      of the cell volume expansion caused by oxygen loss with due
                      regard for penetration depthof X-rays into the pellet
                      allowed to estimate Dchem and kchem found to be close to
                      those obtained by traditionalmethods. Isolated Pr vacancies
                      appear to be the most important for fast oxygen diffusion
                      and high surface reactivityproviding the highest values of
                      kchem and Dchem for Pr1.9NiO4 + δ composition.},
      month         = {Feb},
      date          = {2014-02-01},
      organization  = {, 1 Feb 2014},
      cin          = {IEK-9},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {123 - Fuel Cells (POF2-123) / 152 - Renewable Energies
                      (POF2-152)},
      pid          = {G:(DE-HGF)POF2-123 / G:(DE-HGF)POF2-152},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000338810500201},
      doi          = {10.1016/j.ssi.2014.02.001},
      url          = {https://juser.fz-juelich.de/record/151425},
}