Thermoelectric properties of FeSb2Te based ternary skutterudites with Mo nanoinclusions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F19%3A00505437" target="_blank" >RIV/61389013:_____/19:00505437 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Thermoelectric properties of FeSb2Te based ternary skutterudites with Mo nanoinclusions

Popis výsledku v původním jazyce

Polycrystalline samples of FeSb2Te ternary skutterudite based compounds were prepared by the powder metallurgy method. The influence of additions of Mo nanoparticles into host-matrix compound (FeSb2Te) was investigated. Wet blending route (ultrasonication/rotavapor) was used to obtain homogeneous dispersion of the host-matrix compound with Mo nanoparticles. The nanocomposite powders FeSb2Te+x vol.% Mo (x=0, 2, 4, 6) were hot-pressed for 1hr at 500°C/70 MPa. The prepared p-type samples were characterized by measurements of their electrical conductivity, Seebeck coefficient, and thermal conductivity. SEM and EDX results revealed Mo nanoparticles mainly inside of intergrain space of the host-matrix material. Strikingly, Mo does not react with the matrix material. The presence of the Mo nanoparticles in the intergrain space appears to reduce phonon mean free path resulting in a reduction of the thermal conductivity of the studied nanocomposite materials. The extra scattering of phonons on the embedded Mo nanoparticles is responsible for about 20% increase of ZT at some of the nanocomposite samples.

Název v anglickém jazyce

Thermoelectric properties of FeSb2Te based ternary skutterudites with Mo nanoinclusions

Popis výsledku anglicky

Polycrystalline samples of FeSb2Te ternary skutterudite based compounds were prepared by the powder metallurgy method. The influence of additions of Mo nanoparticles into host-matrix compound (FeSb2Te) was investigated. Wet blending route (ultrasonication/rotavapor) was used to obtain homogeneous dispersion of the host-matrix compound with Mo nanoparticles. The nanocomposite powders FeSb2Te+x vol.% Mo (x=0, 2, 4, 6) were hot-pressed for 1hr at 500°C/70 MPa. The prepared p-type samples were characterized by measurements of their electrical conductivity, Seebeck coefficient, and thermal conductivity. SEM and EDX results revealed Mo nanoparticles mainly inside of intergrain space of the host-matrix material. Strikingly, Mo does not react with the matrix material. The presence of the Mo nanoparticles in the intergrain space appears to reduce phonon mean free path resulting in a reduction of the thermal conductivity of the studied nanocomposite materials. The extra scattering of phonons on the embedded Mo nanoparticles is responsible for about 20% increase of ZT at some of the nanocomposite samples.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA16-07711S" target="_blank" >GA16-07711S: Systematická studie vlivu výšky Schottkyho bariéry na energetické filtrování elektronů v termoelektrických nanokompozitech.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů