Thermoelectric properties of an N-type silicon–germanium alloy related to the presence of silica nodules dispersed in the microstructure

Thermoelectric properties of an N-type silicon–germanium alloy related to the presence of silica nodules dispersed in the microstructure

Tailoring the amount of nanometer-sized nodules made of amorphous silica, resulting from natural oxidation during the processing steps, in an N-type sintered polycrystalline Si92Ge08 material is shown as an effective way to reduce the thermal conductivity without affecting significantly the thermoel...

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Veröffentlicht in:Scripta materialia 2014-12, Vol.93, p.40-43
Hauptverfasser: Bernard-Granger, Guillaume, Favier, Katia, Soulier, Mathieu, Navone, Christelle, Boidot, Mathieu, Deniau, Benoit, Grondin, Pauline, Leforestier, Jean, Simon, Julia
Format: Artikel
Sprache:eng
Schlagworte:
Amorphous materials
Heat transfer
Mechanical alloying
Microstructure
Nanostructure
Nodules
Silicon dioxide
Spark plasma sintering
Thermal conductivity
Thermoelectric materials
Thermoelectricity
Transmission electron microscopy
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Beschreibung
Zusammenfassung:Tailoring the amount of nanometer-sized nodules made of amorphous silica, resulting from natural oxidation during the processing steps, in an N-type sintered polycrystalline Si92Ge08 material is shown as an effective way to reduce the thermal conductivity without affecting significantly the thermoelectric power factor.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.08.026