Abstract
We measure electricity consumption and thermoelectric property of Ag2Te-Ag composites fabricated using green synthesis at room temperature followed by evacuated-and-encapsulated sintering at 500 °C for 10 h. As compared to Ag2Te and Ag2Te-Ag composites fabricated using other methods, we elucidate the effects of Ag nanoparticles on electronic transport of composites at temperatures between structural transition and 525 K based on the Matthiessen's rule and Kohler formula. We also present detailed methods of calculating the Lorenz number with single Kane band model and further deduce the lattice thermal conductivity. As a result, we find that electronic contribution dominates the temperature dependence of the total thermal conductivity of the composites. For energy consumption of heat treatment, the energy-saving approach in this study is only 15–18% of two typical procedures using melting process reported in the literature. If considering consolidation step reported in the literature, our procedure is more economic. We also demonstrate that the energy-saving route of fabricating the Ag2Te-Ag composite leads to a zT value of 0.68 at 573 K, which is comparable to or even higher than that of Ag2Te fabricated using high-energy consumption routes. It is more sensible for fabricating TE materials using less energy consumption.
| Original language | English |
|---|---|
| Pages (from-to) | 318-325 |
| Number of pages | 8 |
| Journal | Journal of Alloys and Compounds |
| Volume | 766 |
| DOIs | |
| Publication status | Published - 2018 Oct 25 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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The effects of Ag nanoparticles on the thermoelectric properties of Ag2Te-Ag composite fabricated using an energy-saving route. / Lin, Fei Hung; Chang, Kuo Chuan; Yang, Zong Ren; Gharleghi, Ahmad; Liu, Chia-Jyi.
In: Journal of Alloys and Compounds, Vol. 766, 25.10.2018, p. 318-325.Research output: Contribution to journal › Article
TY - JOUR
T1 - The effects of Ag nanoparticles on the thermoelectric properties of Ag2Te-Ag composite fabricated using an energy-saving route
AU - Lin, Fei Hung
AU - Chang, Kuo Chuan
AU - Yang, Zong Ren
AU - Gharleghi, Ahmad
AU - Liu, Chia-Jyi
PY - 2018/10/25
Y1 - 2018/10/25
N2 - We measure electricity consumption and thermoelectric property of Ag2Te-Ag composites fabricated using green synthesis at room temperature followed by evacuated-and-encapsulated sintering at 500 °C for 10 h. As compared to Ag2Te and Ag2Te-Ag composites fabricated using other methods, we elucidate the effects of Ag nanoparticles on electronic transport of composites at temperatures between structural transition and 525 K based on the Matthiessen's rule and Kohler formula. We also present detailed methods of calculating the Lorenz number with single Kane band model and further deduce the lattice thermal conductivity. As a result, we find that electronic contribution dominates the temperature dependence of the total thermal conductivity of the composites. For energy consumption of heat treatment, the energy-saving approach in this study is only 15–18% of two typical procedures using melting process reported in the literature. If considering consolidation step reported in the literature, our procedure is more economic. We also demonstrate that the energy-saving route of fabricating the Ag2Te-Ag composite leads to a zT value of 0.68 at 573 K, which is comparable to or even higher than that of Ag2Te fabricated using high-energy consumption routes. It is more sensible for fabricating TE materials using less energy consumption.
AB - We measure electricity consumption and thermoelectric property of Ag2Te-Ag composites fabricated using green synthesis at room temperature followed by evacuated-and-encapsulated sintering at 500 °C for 10 h. As compared to Ag2Te and Ag2Te-Ag composites fabricated using other methods, we elucidate the effects of Ag nanoparticles on electronic transport of composites at temperatures between structural transition and 525 K based on the Matthiessen's rule and Kohler formula. We also present detailed methods of calculating the Lorenz number with single Kane band model and further deduce the lattice thermal conductivity. As a result, we find that electronic contribution dominates the temperature dependence of the total thermal conductivity of the composites. For energy consumption of heat treatment, the energy-saving approach in this study is only 15–18% of two typical procedures using melting process reported in the literature. If considering consolidation step reported in the literature, our procedure is more economic. We also demonstrate that the energy-saving route of fabricating the Ag2Te-Ag composite leads to a zT value of 0.68 at 573 K, which is comparable to or even higher than that of Ag2Te fabricated using high-energy consumption routes. It is more sensible for fabricating TE materials using less energy consumption.
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U2 - 10.1016/j.jallcom.2018.06.359
DO - 10.1016/j.jallcom.2018.06.359
M3 - Article
AN - SCOPUS:85049485568
VL - 766
SP - 318
EP - 325
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -