Syntheses, crystal structures and thermoelectric properties of two new thallium tellurides: Tl4ZrTe4 and Tl4HfTe4

2010 ◽  
Vol 20 (35) ◽  
pp. 7485 ◽  
Author(s):  
Cheriyedath Raj Sankar ◽  
Savitree Bangarigadu-Sanasy ◽  
Abdeljalil Assoud ◽  
Holger Kleinke
Keyword(s):  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Thallium Tellurides

Crystal structure, phase transition and properties of indium(iii) sulfide

2020 ◽  
Vol 49 (44) ◽  
pp. 15903-15913
Author(s):  
Paweł Wyżga ◽  
Wilder Carrillo-Cabrera ◽  
Lev Akselrud ◽  
Igor Veremchuk ◽  
Jörg Wagler ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Dft Calculations ◽  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Structural Part ◽  
Β Phase ◽  
Structure Phase ◽  
Structure Phase Transition

This report presents studies of crystal structures of α- and β-In2S3 as well as a mechanism of the 1st order α–β phase transition. The structural part is supported by an analysis of thermoelectric properties and by DFT calculations.

Thermoelectric Properties of Ru2Si3-Based Chimney-Ladder Phases

2007 ◽  
Vol 561-565 ◽  
pp. 463-466 ◽  
Author(s):  
Kyosuke Kishida ◽  
Akira Ishida ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Electron Concentration ◽  
Valence Electron ◽  
Valence Electron Concentration ◽  
Compositional Range ◽  
Wide Compositional Range ◽  
P Type ◽  
Semiconducting Behavior

The variations of the crystal structures and thermoelectric properties of the Ru1-xRexSiy chimney-ladder phases were studied as a function of the Re concentration. A series of chimney-ladder phases with a compositional formula of Ru1-xRexSi1.539+0.178x are formed in a wide compositional range, 0.14 ≤ x ≤ 0.76. The composition of the chimney-ladder phase is systematically deviated from the idealized composition satisfying the valence electron concentration rule: VEC=14. Measurements of thermoelectric properties reveal that the chimney-ladder phases exhibit n-type semiconducting behavior at low Re concentrations and p-type semiconducting behavior at high Re concentrations, which are well consistent with the prediction based on the deviation of the composition of the chimney-ladder phase from the idealized composition.

Structural evolvement and thermoelectric properties of Cu3−xSnxSe3 compounds with diamond-like crystal structures

2014 ◽  
Vol 43 (44) ◽  
pp. 16788-16794 ◽  
Author(s):  
Jing Fan ◽  
Walter Schnelle ◽  
Iryna Antonyshyn ◽  
Igor Veremchuk ◽  
Wilder Carrillo-Cabrera ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Composition Changes

When the composition changes from a Cu-rich to a Sn-rich one, Cu3−xSnxSe3 shows a metal-to-semiconductor transition with increasing x.

Crystal Structures and Thermoelectric Properties of Sm-Filled Skutterudite Compounds Smy Fex Co4 - x Sb12

2007 ◽  
Vol 25 (6) ◽  
pp. 739-743 ◽  
Author(s):  
Liu Taoxiang ◽  
Tang Xinfeng ◽  
Xie Wenjie ◽  
Yan Yonggao ◽  
Zhang Qingjie
Keyword(s):  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Filled Skutterudite

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.

ChemInform Abstract: Synthesis, Crystal Structures and High-Temperature Thermoelectric Properties of Spinel-Type Cobalt Ruthenium Oxides.

ChemInform ◽  
2009 ◽  
Vol 40 (15) ◽  
Author(s):  
Tetsuya Kawano ◽  
Junichi Takahashi ◽  
Takeshi Okutani ◽  
Takahiro Yamada ◽  
Hisanori Yamane
Keyword(s):  
High Temperature ◽  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Spinel Type ◽  
Ruthenium Oxides

scholarly journals Structure and Thermoelectric Properties of New Layered Compounds in the Quaternary System Cs-Pb-Bi-Te

2001 ◽  
Vol 691 ◽  
Author(s):  
Kuei-Fang Hsu ◽  
Duck-Young Chung ◽  
Sangeeta Lal ◽  
Tim Hogan ◽  
Mercouri G. Kanatzidis
Keyword(s):  
Crystal Structures ◽  
Thermoelectric Properties ◽  
Homologous Series ◽  
Quaternary System ◽  
Layered Structures ◽  
Layered Compounds ◽  
Preliminary Results ◽  
New Compounds

ABSTRACTBy introducing of various equivalents of PbTe into the layered framework of CsBi4Te6, the four new compounds CsPbBi3Te6 (1), CsPb2Bi3Te7 (2), CsPb3Bi3Te8 (3) and CsPb4Bi3Te9 (4), were discovered. The compounds adopt layered structures built up of anionic slabs of progressively increasing thickness. The [PbmBi3Te5+m]- (m = 1, 2, 3, 4) slabs in the four structures can be viewed as fragments excised from the PbTe-type structures with 4-, 5-, 6- and 7-monolayers, respectively. As prepared, these materials are off-stoichiometric and n-type conductors. We present preliminary results of the crystal structures and thermoelectric properties of these materials and classify them as members of the new homologous series CsPbmBi3Te5+m (m = 1 to 4).

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