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@ARTICLE{Dadda:16641,
      author       = {Dadda, J. and Müller, E. and Perlt, S. and Höche, T. and
                      Bauer Pereira, P. and Hermann, R.},
      title        = {{M}icrostructures and {N}anostructures in long-term
                      {A}nnealed {A}g{P}b18{S}b{T}e20 ({LAST}-18) {C}ompounds and
                      their {I}nfluence on the {T}hermoelectric {P}roperties},
      journal      = {Journal of materials research},
      volume       = {26},
      issn         = {0884-2914},
      address      = {Warrendale, Pa.},
      publisher    = {MRS},
      reportid     = {PreJuSER-16641},
      pages        = {1800 - 1812},
      year         = {2011},
      note         = {The authors thank the Federal Ministry for Education and
                      Research (BMBF), Germany "Werkstofftechnologien von
                      morgen-Wissenschaftliche Vorprojekte in Werkstoff-und
                      Nanotechnologien," for funding this research study
                      (03X3540A). Raphael Hermann acknowledges the
                      Helmholtz-Gemeinschaft Deutscher Forschungszentren for
                      funding of the Young Investigator Group "Lattice dynamics in
                      emerging functional materials." The authors also thank Dr.
                      Peter Werner for his valuable contribution in HRTEM
                      investigations performed at Max Planck Institute, Halle,
                      Germany.},
      abstract     = {This article reports on the role of annealing on the
                      development of microstructure and its concomitant effects on
                      the thermoelectric properties of polycrystalline
                      AgPbmSbTe2+m (m = 18, lead-antimony-silver- tellurium,
                      LAST-18) compounds. The annealing temperature was varied by
                      applying a gradient annealing method, where a 40-mm-long
                      sample rod was heat treated in an axial temperature gradient
                      spanning between 200 and 600 degrees C for 7 days.
                      Transmission electron microscopy investigations revealed
                      Ag2Te nanoparticles at a size of 20-250 nm in the matrix. A
                      remarkable reduction in the thermal conductivity to as low
                      as 0.8W/mK was also recorded. The low thermal conductivity
                      coupled with a large Seebeck coefficient of similar to 320
                      mu V/K led to high ZT of about 1.05 at 425 degrees C for the
                      sample annealed at 505 degrees C. These results also
                      demonstrate that samples annealed above 450 degrees C for
                      long term are more thermally stable than those treated at
                      lower temperatures.},
      keywords     = {J (WoSType)},
      cin          = {JARA-FIT / JCNS-2 / PGI-4},
      ddc          = {670},
      cid          = {$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)PGI-4-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien /
                      Großgeräte für die Forschung mit Photonen, Neutronen und
                      Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK412 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Materials Science, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000296080700008},
      doi          = {10.1557/jmr.2011.142},
      url          = {https://juser.fz-juelich.de/record/16641},
}