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@ARTICLE{Tietz:283682,
      author       = {Tietz, F. and Arul Raj, I. and Ma, Q. and Baumann, S. and
                      Mahmoud, A. and Hermann, Raphael},
      title        = {{M}aterial properties of perovskites in the quasi-ternary
                      system
                      {L}a{F}e{O}$_{3}$–{L}a{C}o{O}$_{3}$–{L}a{N}i{O}$_{3}},
      journal      = {Journal of solid state chemistry},
      volume       = {237},
      issn         = {0022-4596},
      address      = {Orlando, Fla.},
      publisher    = {Academic Press},
      reportid     = {FZJ-2016-01979},
      pages        = {183 - 191},
      year         = {2016},
      abstract     = {An overview is presented on the variation of electrical
                      conductivity, oxygen permeation, and thermal expansion
                      coefficient as a function of the composition of perovskites
                      in the quasi-ternary system LaFeO3–LaCoO3–LaNiO3.
                      Powders of thirteen nominal perovskite compositions were
                      synthesized under identical conditions by the Pechini
                      method. The powder X-ray diffraction data of two series,
                      namely La(Ni0.5Fe0.5)1−xCoxO3 and LaNi0.5-xFexCo0.5O3, are
                      presented after the powders had been sintered at 1100 °C
                      for 6 h in air. The measurements revealed a rhombohedral
                      structure for all compositions except LaNi0.5Fe0.5O3 for
                      which $60\%$ rhombohedral and $40\%$ orthorhombic phase was
                      found. The maximum DC electrical conductivity value of the
                      perovskites at 800 °C was 1229 S cm−1 for the composition
                      LaCoO3 and the minimum was 91 S cm−1 for the composition
                      LaCo0.5Fe0.5O3. The oxygen permeation of samples with
                      promising conductivities at 800 °C was one order of
                      magnitude lower than that of La0.6Sr0.4Co0.8Fe0.2O3 (LSCF).
                      The highest value of 0.017 ml cm−2 min−1 at 950 °C was
                      obtained with LaNi0.5Co0.5O3. The coefficients of thermal
                      expansion varied in the range of 13.2×10−6 K−1 and
                      21.9×10−6 K−1 for LaNi0.5Fe0.5O3 and LaCoO3,
                      respectively. 57Fe Mössbauer spectroscopy was used as probe
                      for the oxidation states, local environment and magnetic
                      properties of iron ions as a function of chemical
                      composition. The substitution had a great influence on the
                      chemical properties of the materials.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / IEK-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)IEK-1-20101013},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000373661100026},
      doi          = {10.1016/j.jssc.2016.01.024},
      url          = {https://juser.fz-juelich.de/record/283682},
}