The effects of Ag nanoparticles on the thermoelectric properties of Ag2Te-Ag composite fabricated using an energy-saving route

Fei Hung Lin, Kuo Chuan Chang, Zong Ren Yang, Ahmad Gharleghi, Chia-Jyi Liu

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 languageEnglish
Pages (from-to)318-325
Number of pages8
JournalJournal of Alloys and Compounds
Volume766
DOIs
Publication statusPublished - 2018 Oct 25

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Energy conservation
Nanoparticles
Composite materials
Energy utilization
Thermal conductivity
Consolidation
Temperature
Melting
Sintering
Electricity
Heat treatment
Economics

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "The effects of Ag nanoparticles on the thermoelectric properties of Ag2Te-Ag composite fabricated using an energy-saving route",
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.",
author = "Lin, {Fei Hung} and Chang, {Kuo Chuan} and Yang, {Zong Ren} and Ahmad Gharleghi and Chia-Jyi Liu",
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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 journalArticle

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AU - Lin, Fei Hung

AU - Chang, Kuo Chuan

AU - Yang, Zong Ren

AU - Gharleghi, Ahmad

AU - Liu, Chia-Jyi

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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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