High thermoelectric properties of n-type Cd-doped PbTe prepared by melt spinning

We investigated the thermoelectric properties of n-type Cd-doped PbTeCdx alloys (x=0, 0.01, 0.02, 0.04) prepared by melt spinning combined with rapid induction hot pressing. Transmission electron microscopy revealed rhombo-cubo-octahedron shape precipitates (~5nm) in PbTeCd0.02 sample. The two-dimen...

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Bibliographic Details
Published in:Scripta materialia 2016-09, Vol.122, p.1-4
Main Authors: Ding, Guangchao, Si, Jianxiao, Yang, Shidan, Wang, GuWei, Wu, Haifei
Format: Article
Language:English
Subjects:
Alloys
Figure of merit
Hot pressing
Lead base alloys
Melt spinning
Nanostructure
Precipitates
Precipitation
Rapid solidification
Thermoelectric properties
Thermoelectricity
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Summary:We investigated the thermoelectric properties of n-type Cd-doped PbTeCdx alloys (x=0, 0.01, 0.02, 0.04) prepared by melt spinning combined with rapid induction hot pressing. Transmission electron microscopy revealed rhombo-cubo-octahedron shape precipitates (~5nm) in PbTeCd0.02 sample. The two-dimensional electron gas that existed on the interface of precipitates resulted in an increase in power factor. The peak figure of merit reached 1.5 at 723K as well as a high average figure of merit of 0.93 in the temperature range from 298 to 673K. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2016.05.016