کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1614454 | 1516335 | 2013 | 6 صفحه PDF | دانلود رایگان |
To enhance the Seebeck coefficient and reduce the thermal conductivity while maintaining a satisfied electrical conductivity, a disordered structure was introduced into the La0.3Ce0.37Fe3CoSb12 crystalline by adding a low-melting-point lead telluride (PbTe). The results suggest that the disordered structure created by the melted PbTe at 870 K can be partly preserved into the La0.3Ce0.37Fe3CoSb12 materials at room temperature. With the existence of the disordered structure the Seebeck coefficient at 773 K is increased from 143 μV K−1 to 265 μV K−1, while the thermal conductivity is reduced from 2.12 W m−1 K−1 to 1.60 W m−1 K−1, nevertheless the electrical conductivity is dropped from 78,000 Ω−1 m−1 to 23,500 Ω−1 m−1. A figure of merit of 0.95 at 773 K is observed for the material containing 40% PbTe.
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► We fabricate a material with disordered and ordered structures.
► We create and preserve the disordered structure into materials.
► Disordered structure enhances the Seebeck coefficient largely.
► Disordered structure reduces the thermal conductivity obviously.
► The strategy can also be applied to other thermoelectric alloys.
Journal: Journal of Alloys and Compounds - Volume 558, 5 May 2013, Pages 50–55