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Thermoelectric and transport properties of nanostructured Bi 2 Te 3 by spark plasma sintering
Ist Teil von
Journal of materials research, 2011-02, Vol.26 (3), p.475-484
Erscheinungsjahr
2011
Link zum Volltext
Quelle
Springer Nature - Complete Springer Journals
Beschreibungen/Notizen
Abstract
N-type Bi
2
Te
3
alloys with different microstructural length scales were prepared by mechanical milling and spark plasma sintering (SPS). The electrical resistivity, thermal conductivity, Seebeck coefficient, carrier concentration, and Hall mobility along and perpendicular to the loading direction were determined and characterized. The SPS sintered bulk disks using nanostructured powder contain high nanoporosity and weak (00l) texture along the loading axis, in contrast to those obtained with coarse powder. The influence of nanoporosity and texture on the thermoelectric and transport properties in the n-type Bi
2
Te
3
alloys is discussed in light of the microstructural characteristics at different length scales.