- Tytuł:
- The Influence of Ag2Te Addition on Thermoelectric Properties of Bismuth Telluride
- Autorzy:
-
Drzewowska, Sylwia
Lan, Tian-Wey
Onderka, Bogusław - Powiązania:
- https://bibliotekanauki.pl/articles/2048873.pdf
- Data publikacji:
- 2022
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
thermoelectric materials
Seebeck coefficient
resistivity
thermal diffusivity
Bi2Te3-Ag2Te system - Opis:
- The resistivity, Seebeck coefficient and thermal diffusivity were determined for BiTe3 + Ag2Te composite mixtures. Subsequent measurements were carried out in the temperature range from 20 to 270°C, and for compositions from pure Bi2Te3 to xAg2Te = 0.65 selected along the pseudo-binary section of Ag-Bi-Te ternary system. It was found that conductivity vs. temperature dependence shows visible jump between 140 and 150°C in samples with highest Ag2Te content, which is due to monoclinic => cubic Ag2Te phase transformation. Measured Seebeck coefficient is negative for all samples indicating they are n-type semiconductors. Evaluated power factor is of the order 1.52·10-3 and it decreases with increasing Ag2Te content (at. %). Recalculated thermal conductivity is of the order of unity in W/(m K), and is decreasing with Ag2Te addition. Finally, evaluated Figure of Merit is 0.43 at 100°C and decreases with temperature rise.
- Źródło:
-
Archives of Metallurgy and Materials; 2022, 67, 1; 5-15
1733-3490 - Pojawia się w:
- Archives of Metallurgy and Materials
- Dostawca treści:
- Biblioteka Nauki
Artykuł