Dimensionless figure of merit of constantan estimated using impedance spectroscopy

2020 ◽  
Vol 13 (10) ◽  
pp. 106501
Author(s):  
Ryo Shinozaki ◽  
Shinya Hirabayashi ◽  
Yasuhiro Hasegawa
Keyword(s):  
Impedance Spectroscopy ◽  
Figure Of Merit ◽  
Dimensionless Figure Of Merit

Investigation of Thermoelectric Materials: Substitution effect of Bi on the Ag1-xPb18MTe20 (M = Sb, Bi) (x = 0, 0.14, 0.3)

2007 ◽  
Vol 1044 ◽  
Author(s):  
Mi-kyung Han ◽  
Huijun Kong ◽  
Ctirad Uher ◽  
Mercouri G Kanatzidis
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Seebeck Coefficient ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Lattice Thermal Conductivity ◽  
Substitution Effect ◽  
Dimensionless Figure Of Merit ◽  
The Matrix ◽  
Mass Fluctuation

AbstractWe performed comparative investigations of the Ag1-xPb18MTe20 (M = Bi, Sb) (x = 0, 0.14, 0.3) system to better understand the roles of Sb and Bi on the thermoelectric properties. In both systems, the electrical conductivity nearly keeps the same values, while the Seebeck coefficient decreases dramatically in going from Sb to Bi. Compared to the lattice thermal conductivity of PbTe, that of AgPb18BiTe20 is substantially reduced. The lattice thermal conductivity of the Bi analog, however, is higher than that of AgPb18SbTe20 and this is attributed largely to the decrease in the degree of mass fluctuation between the nanostructures and the matrix (for the Bi analog). As a result the dimensionless figure of merit ZT of Ag1-xPb18MTe20 (M = Bi) is found to be smaller than that of Ag1-xPb18MTe20 (M = Sb).

scholarly journals A facile energy-saving route of fabricating thermoelectric Sb 2 Te 3 -Te nanocomposites and nanosized Te

2018 ◽  
Vol 5 (10) ◽  
pp. 180698 ◽  
Author(s):  
En-Yu Liu ◽  
Fei-Hung Lin ◽  
Zong-Ren Yang ◽  
Chia-Jyi Liu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Power Factor ◽  
Hot Pressing ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Organic Chemicals ◽  
Nanosized Powders ◽  
Dimensionless Figure Of Merit ◽  
Fabrication Procedure

A facile energy-saving route is developed for fabricating Sb 2 Te 3 -Te nanocomposites and nanosized Te powders. The fabrication route not only avoids using organic chemicals, but also keeps the energy consumption to a minimum. The fabrication procedure involves two steps. Energetic precursors of nanosized powders of Sb and Te are produced at room temperature followed by hot pressing at 400°C under 70 MPa for 1 h. The resulting Sb 2 Te 3 -Te nanocomposite exhibits enhanced power factor. The dimensionless figure of merit zT value of the Sb 2 Te 3 -Te nanocomposite is 0.29 at 475 K.

Environmentally friendly thermoelectric sulphide Cu2ZnSnS4 single crystals with dimensionless figure of merit ZT achieving 1.6

2021 ◽  
Author(s):  
Akira Nagaoka ◽  
Kenji Yoshino ◽  
Taizo Masuda ◽  
Taylor D. Sparks ◽  
Michael A. Scarpulla ◽  
...  
Keyword(s):  
Electric Power ◽  
Single Crystals ◽  
High Performance ◽  
Figure Of Merit ◽  
Environmentally Friendly ◽  
Heat Sources ◽  
Important Class ◽  
Dimensionless Figure Of Merit ◽  
Cubic Structure

Thermoelectrics (TEs) are an important class of technologies for harvesting electric power directly from heat sources. To design both high performance and environmentally friendly for TE materials, pseudo-cubic structure has...

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