scholarly journals Thermoelectric Properties of Tin Telluride Quasi Crystal Grown by Vertical Bridgman Method

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3001 ◽  
Author(s):  
Yue-Xing Chen ◽  
Fu Li ◽  
Delong Li ◽  
Zhuanghao Zheng ◽  
Jingting Luo ◽  
...  

Tin telluride (SnTe), with the same rock salt structure and similar band structure of PbTe alloys, was developed as a good thermoelectric material. In this work, SnTe quasi crystal was grown by vertical Bridgman method, with texturing degree achieved at 0.98. Two sets of samples, perpendicular and parallel to the growth direction, were cut to investigate thermoelectric properties. As a result, a carrier concentration (pH) of ~9.5 × 1020 cm−3 was obtained, which may have originated from fully generated Sn vacancies during the long term crystal growth. The relatively high Seebeck coefficient of ~30 μVK−1 and ~40 μVK−1 along the two directions was higher than most pristine SnTe reported in the literature, which leads to the room temperature (PF) for SnTe_IP and SnTe_OP achieved at ~14.0 μWcm−1K−2 and ~7.0 μWcm−1K−2, respectively. Finally, the maximum dimensionless figure of merit (ZT) values were around 0.55 at 873 K.

2005 ◽  
Vol 386 (1-2) ◽  
pp. 228-233 ◽  
Author(s):  
M. Akasaka ◽  
T. Iida ◽  
G. Sakuragi ◽  
S. Furuyama ◽  
M. Noda ◽  
...  

2008 ◽  
Vol 104 (1) ◽  
pp. 013703 ◽  
Author(s):  
Masayasu Akasaka ◽  
Tsutomu Iida ◽  
Atsunobu Matsumoto ◽  
Kohei Yamanaka ◽  
Yoshifumi Takanashi ◽  
...  

Author(s):  
Chang-Bao HUANG ◽  
You-Bao NI ◽  
Hai-Xin WU ◽  
Zhen-You WANG ◽  
Xu-Dong CHENG ◽  
...  

2016 ◽  
Vol 869 ◽  
pp. 637-642
Author(s):  
Rafael Cardoso Toledo ◽  
Chen Y. An ◽  
Irajá Newton Bandeira ◽  
Filipe Estevão de Freitas

Composition profiles of eutectic alloy Pb25.9Sn74.1 atomic % grown by the normal and inverted Bridgman methods are presented and the study of the solute alloy redistribution is made. The inverted vertical Bridgman method, where the solidification occurs from the top to the bottom of the melt under a destabilizing thermal gradient, allows the growth of crystals with buoyancy-driven convection different from that with the usual vertical Bridgman configuration. The scope of this work is to study the influence of the gravity acceleration in the convection process.


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