A Potential in Thermoelectric Oxide Phononic Crystal

2016 ◽  
Vol 257 ◽  
pp. 156-159
Author(s):  
Norifusa Satoh
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Thermoelectric Power ◽  
Heat Transport ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Phononic Crystal ◽  
Thermoelectric Oxide ◽  
Heavy Atoms ◽  
Atomic Properties

The high performance thermoelectric materials consist of heavy atoms due to their low thermal conductivity. However, the atomic properties have limited the thermoelectric power. The paper suggests that oxide may change the situation with a phononic crystal structure to inhibit heat transport.

Crystal structure of high-performance thermoelectric materials by high resolution neutron powder diffraction

2018 ◽  
Vol 551 ◽  
pp. 64-68 ◽  
Author(s):  
Peng Wu ◽  
Yoshihisa Ishikawa ◽  
Masato Hagihala ◽  
Sanghyun Lee ◽  
Kunling Peng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Powder Diffraction ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Neutron Powder Diffraction

Thallium-Free Thermoelectric Materials with Extremely Low Thermal Conductivity

2007 ◽  
Vol 1044 ◽  
Author(s):  
Shinsuke Yamanaka ◽  
Ken Kurosaki ◽  
Anek Charoenphakdee ◽  
Hideaki Mastumoto ◽  
Hiroaki Muta
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Next Generation ◽  
Practical Application ◽  
Low Thermal Conductivity ◽  
New Class ◽  
Thallium Compounds ◽  
Thallium Tellurides

AbstractWith the goal of developing high-performance bulk thermoelectric materials, we have characterized ternary silver thallium tellurides. The ternary silver thallium tellurides exhibit extremely low thermal conductivity (<0.5 Wm−1K−1) and consequently their thermoelectric performance is excellent. Although the extremely low thermal conductivity materials, as typified by the ternary silver thallium tellurides, would be a new class of next-generation thermoelectric materials, thallium compounds are unsuitable for practical application because of their toxicity. Against such a background, we are currently exploring thallium-free thermoelectric materials with extremely low thermal conductivity. In this paper, we will briefly summarize the thermoelectric properties of ternary thallium tellurides obtained in our group. Further experiments aimed at improving the ZT of these materials will be presented. Finally, we will propose two candidates: Ag8GeTe6 and Ga2Te3 as thallium-free low thermal conductivity materials.

scholarly journals Crystal structure dependent thermal conductivity in two-dimensional phononic crystal nanostructures

2015 ◽  
Vol 107 (2) ◽  
pp. 023104 ◽  
Author(s):  
Junki Nakagawa ◽  
Yuta Kage ◽  
Takuma Hori ◽  
Junichiro Shiomi ◽  
Masahiro Nomura
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Phononic Crystal ◽  
Two Dimensional

On The Thermoelectric Power And Transport Properties Of Quasicrystals

1998 ◽  
Vol 553 ◽  
Author(s):  
F. Cyrot-Lackmann
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Fermi Surface ◽  
Physical Properties ◽  
Thermoelectric Power ◽  
Thermoelectric Materials ◽  
Figure Of Merit ◽  
Room Temperature ◽  
Phonon Drag ◽  
Crude Estimate

Stable quasicrystals exhibit specific and unusual physical properties, such as, diamagnetism, low electrical conductivity, low thermal conductivity, and large themoelectric power at room temperature. These properties can be understood with a Bragg's reflexions scheme due to their dense filled reciprocal space.This leads to small gaps on the Fermi surface (some tenths of eV), much narrower than the usual Hume-Rothery ones (of order of 0.5 eV) which explain their stability. These gaps lead to the existence of quasi Umklapp processes, crucial for the interpretation of thermoelectric power. In some cases, the positive phonon drag contribution due to Umklapp processes, add with the electronic one's and dominates at room temperature with a large positive thermoelectric power. A crude estimate of the figure of merit gives some hope for applications of some quasicrystals and high approximants as new thermoelectric materials.

Simultaneous Optimization of Power Factor and Thermal Conductivity towards High-Performance InSb-Based Thermoelectric Materials

2021 ◽  
Vol 38 (9) ◽  
pp. 097201
Author(s):  
Wang Li ◽  
Tian Xu ◽  
Zheng Ma ◽  
Abubakar-Yakubu Haruna ◽  
Qing-Hui Jiang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Power Factor ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Simultaneous Optimization

Measurement of the Thermoelectric Properties of Quasicrystalline AlPdRe and AlCuFe Alloys.

1997 ◽  
Vol 478 ◽  
Author(s):  
M.L. Wilson ◽  
S. Legault ◽  
R.M. Stroud ◽  
T.M. Tritt
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Thermoelectric Power ◽  
Thermoelectric Properties ◽  
Thermoelectric Materials ◽  
General Class ◽  
Careful Investigation

AbstractWe report the measurement of the thermal conductivity, electrical resistivity, and thermoelectric power on two quasicrystalline compounds, A170Pd20Re10 and A162.5Cu25Fe12.5. These materials are found to posses a thermal conductivity of order 1 W/m K, while retaining their semimetallic conductivity. These features coupled with moderately large thermopowers, up to 55 μV/K, imply that the general class of quasicrystalline compounds warrants careful investigation for their potential as new thermoelectric materials.

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