Journal ArticleDOI
Thermoelectric properties of Bi-doped Mg2Si semiconductors
Jun-ichi Tani,Hiroyasu Kido +1 more
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TLDR
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.Abstract:
The thermoelectric properties of Bi-doped Mg2Si (Mg2Si:Bi=1:x) fabricated by spark plasma sintering process 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. Bi-doped Mg2Si samples are n-type in the measured temperature range. The electron concentration of Bi-doped Mg2Si at 300 K ranges from 1.8×1019 cm−3 for the Bi concentration x = 0.001 to 1.1×1020 cm−3 for x = 0.02 . The solubility limit of Bi in Mg2Si is estimated to be about 1.3 at% and first-principles calculation revealed that Bi atoms are expected to be primarily located at the Si sites in Mg2Si. The electrical resistivity, Seebeck coefficient, and thermal conductivity are strongly affected by the Bi concentration. The sample of x = 0.02 shows a maximum value of the figure of merit, ZT, is 0.86 at 862 K.read more
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Consolidation/synthesis of materials by electric current activated/assisted sintering
TL;DR: In this paper, the authors provide an updated and comprehensive description of the development of the Electric Current Activated/assisted Sintering technique (ECAS) for the obtainment of dense materials including nanostructured ones.
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A review on thermoelectric renewable energy: Principle parameters that affect their performance
Mohamed Hamid Elsheikh,Dhafer Abdulameer Shnawah,Mohd Faizul Mohd Sabri,Suhana Mohd Said,Masjuki Haji Hassan,Mohamed Bashir Ali Bashir,Mahazani Mohamad +6 more
TL;DR: In this paper, basic knowledge of thermoelectric materials and an overview of parameters that affect the figure of merit ZT are provided, as well as the prospects for the optimization and their applications are also discussed.
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Recent development and application of thermoelectric generator and cooler
TL;DR: In this article, the basic concepts of the thermoelectric and discusses its recent material researches about the figure of merit are discussed, and the recent applications of the thermal generator, including the structure optimization, low temperature recovery, the heat resource and its application area.
Journal ArticleDOI
Thermal conductivity of bulk and nanowire Mg 2 Si x Sn 1-x alloys from first principles
TL;DR: In this article, the lattice thermal conductivity of thermoelectric materials, such as Mg${}_{2}$Si, Mg{}_{1\ensuremath{-kappa}$], Mg {1}$Ge{1}{2}{3}{4}, and Mg ${}_{ 2}µ$Siµ, and their alloys, were calculated for bulk and nanowires, without adjustable parameters.
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Recent advances in high-performance bulk thermoelectric materials
Xun Shi,Lidong Chen,Ctirad Uher +2 more
TL;DR: In this paper, the authors summarise the recent progress in bulk thermoelectric (TE) materials and summarize the recently achieved enhancements in the TE performance encompassing the use of electronic band structure engineering, lattice phon...
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Semiconducting Properties of Mg 2 Si Single Crystals
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Journal ArticleDOI
Preparation and Thermoelectric Properties of Mg 2 Si 1− x Ge x ( x =0.0∼0.4) Solid Solution Semiconductors
Yasutoshi Noda,Hiroyuki Kon,Yoshitaka Furukawa,Nobuyuki Otsuka,Isao Nishida,Katashi Masumoto +5 more
TL;DR: In this article, the effects of impurities were investigated for dopants of Sb and Ag in Mg 2 Si 1-x Ge x Solid Solution Semiconductors in the composition range 0.0≤x≤0.4.