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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},
}