Wei, K.
, Martin, J.
and Nolas, G.
(2014),
Synthesis, SPS processing and low temperature transport properties of polycrystalline FeSb2 with nano-scale grains, Materials Letters, [online], https://doi.org/10.1016/j.matlet.2014.02.054
(Accessed December 14, 2024)
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Synthesis, SPS processing and low temperature transport properties of polycrystalline FeSb2 with nano-scale grains
Published
Author(s)
Kaya Wei, , George S. Nolas
Abstract
FeSb2 nanocrystals were synthesized by employing an ethanol-mediated surfactant-free solvothermal approach and subsequently densified to form dense polycrystalline Pnnm FeSb2 with nano grains employing spark plasma sintering (SPS). Structural and low temperature transport properties of these nanostructured polycrystalline FeSb2 were investigated and compared with that of bulk FeSb2. The nanostructured FeSb2 had a much lower thermal conductivity, particularly below 150 K, with resistivity values that were comparable to that of the bulk at these temperatures. This resulted in enhanced thermoelectric properties at cryogenic temperatures as compared to that of the bulk. The ability to form nanostructured polycrystalline materials by SPS processing of solution-phase synthesized nanocrystals, together with the resulting enhanced thermoelectric properties, represent proof of concept for this approach for low-temperature thermoelectrics applications.Citation
Materials Letters
Pub Type
Journals
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Keywords
Thermoelectrics, Nanocrystalline materials, Electrical properties
Citation
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Created February 23, 2014, Updated October 12, 2022