Proceedings ArticleDOI
Thermoelectric Properties of Mg2Si Doped with Bi and Al with Conductive Glass Inclusion
Nikhil Satyala,Jerzy S. Krasinski,Daryoosh Vashaee +2 more
- pp 1-5
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TLDR
In this paper, the effect of inclusion of a minuscule quantity (0.25vol%) of Mg-Si-B-R based conductive glass-frit in order to reduce the brittleness of samples has been investigated on the Al-doped Mg2Si samples.Abstract:
The thermoelectric (TE) properties of magnesium silicide (Mg2Si) fabricated through mechanical alloying and hot-pressing have been characterized by measurements of electrical resistivity (ρ), Seebeck coefficient (S) and thermal conductivity (κ) between 300 K and 970 K. TE samples of 2-at% Bi doped and 2-at% Al doped specimens were sintered at 1173 K and 1123 K, respectively. Structural analysis of the sintered samples was performed by scanning electron microscopy. The effect of inclusion of a minuscule quantity (0.25-vol%) of Mg-Si-B-R based conductive glass-frit in order to reduce the brittleness of samples has been investigated on the Al-doped Mg2Si samples. Power factors (S2σT) of greater than 2 W/mK were obtained from samples doped with Al. The samples mixed with conductive glass frit have also exhibited higher stability at temperatures greater than 900 K when compared to samples doped with Bi. The Mg2Si:Bi and Mg2Si:Al samples showed a maximum figure-of- merit (ZT) of 0.53 and 0.66 at 970 K, respectively.read more
Citations
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Journal ArticleDOI
Simultaneous enhancement of mechanical and thermoelectric properties of polycrystalline magnesium silicide with conductive glass inclusion
TL;DR: In this paper, the authors report the results of a novel technique to improve the mechanical and TE properties of magnesium silicide (Mg2Si) via addition of a small quantity (0.25-1.vol%) of conductive glass-frit.
Journal ArticleDOI
Meta-study: Analysis of thermoelectric figure of merit parameters for silicides with various doping agents
TL;DR: In this article, a meta-study investigates silicides for potential TEG applications due to their high chemical stability and higher natural abundance than other thermoelectric (TE) materials, and it was found that chromium silicides were most effective at a temperature range of 600-800 K, and undoped magnesium silicides are most effective around 900 K.
References
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TL;DR: A new era of complex thermoelectric materials is approaching because of modern synthesis and characterization techniques, particularly for nanoscale materials, and the strategies used to improve the thermopower and reduce the thermal conductivity are reviewed.
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TL;DR: In this article, Rowe et al. proposed a method for reducing the thermal conductivity of a thermoelectric generator by reducing the carrier concentration of the generator, which was shown to improve the generator's performance.
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Thermal Conductivity: Theory, Properties, and Applications
TL;DR: The theory of thermal conductivity in solid materials has been discussed in detail in this article, including thermal properties of thin film and superlattices, and applications of emerging materials such as glasses and ceramic materials.
Journal ArticleDOI
Highly effective Mg 2 Si 1 − x Sn x thermoelectrics
V. K. Zaitsev,M. I. Fedorov,E. A. Gurieva,I. S. Eremin,P. P. Konstantinov,A. Yu. Samunin,M.V. Vedernikov +6 more
TL;DR: In this paper, a detailed investigation of thermoelectric compounds and their quasibinary alloys is presented, and it is shown that the combination of transport properties and band structure features has the most promising performance for thermolectric applications.
Journal ArticleDOI
Thermoelectric properties of Bi-doped Mg2Si semiconductors
Jun-ichi Tani,Hiroyasu Kido +1 more
TL;DR: The thermoelectric properties of Bi-doped Mg2Si have been characterized by Hall effect measurements at 300 K and by measurements of electrical resistivity ( ρ ), Seebeck coefficient (S), and thermal conductivity ( κ ) between 300 and 900 K.