Nanostructure and thermoelectric properties of p-type Bi0.5Sb1.5Te3 compound prepared by melt spinning technique

2007 ◽  
Author(s):  
W.J. Xie ◽  
X.F. Tang ◽  
G. Chen ◽  
Q. Jin ◽  
Q.J. Zhang
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
P Type ◽  
Melt Spinning Technique

Thermoelectric properties of Si/SiB3 sub-micro composite prepared by melt-spinning technique

2015 ◽  
Vol 118 (6) ◽  
pp. 065103 ◽  
Author(s):  
Jun Xie ◽  
Yuji Ohishi ◽  
Yoshinobu Miyazaki ◽  
Aikebaier Yusufu ◽  
Hiroaki Muta ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
Melt Spinning Technique

Thermoelectric properties of germanium telluride with fine-grained structure

2020 ◽  
Vol 11 ◽  
pp. 15-25
Author(s):  
L. D. Ivanova ◽  
◽  
Yu. V. Granatkina ◽  
I. Yu. Nikhezina ◽  
A. G. Malchev ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
High Energy ◽  
Grain Structure ◽  
Thermoelectric Efficiency ◽  
Fine Grained ◽  
Germanium Telluride ◽  
Fine Grained Structure ◽  
Properties Of Materials ◽  
P Type

The microstructure and thermoelectric properties of materials based on germanium telluride p-type conductivity doped with copper and bismuth obtained by hot pressing of three types powders prepared by grinding an ingot to a size of hundreds microns (0.315  mm) to hundreds of nanometers (mechanical activation) in planetary high-energy mill and melt spinning were investigated. The microstructure of the samples were analyzed by optical and electron scanning microscopies. The nanoscale grain structure of these samples was established. The thermoelectric characteristics of the materials: Seebeck coefficient, electrical and thermal conductivities, were measured both at room temperature and in the temperature range of 100 – 800 K. The slopes of these dependencies are estimated. The coefficient of thermoelectric figure of merit is calculated. The higher thermoelectric efficiency (ZT = 1.5 at 600 K) was received for the samples hot-pressed from granules, prepared by melt spinning.

Thermoelectric properties of Si/CoSi2 sub-micrometer composites prepared by melt-spinning technique

2017 ◽  
Vol 121 (20) ◽  
pp. 205107 ◽  
Author(s):  
Jun Xie ◽  
Yuji Ohishi ◽  
Satoshi Ichikawa ◽  
Hiroaki Muta ◽  
Ken Kurosaki ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
Melt Spinning Technique

Melt Spinning Preparation of Bismuth Telluride and Partially Alloying with IV-VI Compounds for Thermoelectric Application

2007 ◽  
Vol 1044 ◽  
Author(s):  
Harald Boettner ◽  
Dirk Ebling ◽  
Alexandre Jacquot ◽  
Uta Kühn ◽  
Jürgen Schmidt ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Melt Spinning ◽  
Thermoelectric Figure Of Merit ◽  
Bulk Materials ◽  
Thermoelectric Figure ◽  
Post Annealing ◽  
Melt Spin ◽  
Melt Spinning Technique ◽  
Thermoelectric Application

AbstractThe melt spinning technique (MST) combined with post annealing processes is evaluated for the development of thermoelectric nanocomposites. The evaluated ones are based on two components almost immiscible in solid state but with crystallographic correlation. One is taken from the V-VI-components system and the other one from the IV-VI-components system. This concept was applied to p-(Bi0,2Sb0,8)2Te3 and to p-[(Bi0,2Sb0,8)2Te3]1-xPbTex composites. MST samples of all types were characterised for some structural and thermoelectric properties. All V-VI materials are clearly textured after MST and show no deterioration concerning the thermoelectric properties even after subsequent annealing processes. Structural analysis of p-[(Bi0,2Sb0,8)2Te3]1-xPbTex composites gave significant hints for oriented precipitates of a IV-VI-rich phase incorporated into the V-VI-rich matrix. The thermoelectric figure of merit of the evaluated composites could be enhanced by suitable annealing procedures of both the quenched bulk materials and the melt spin material.

Rapidly Solidified Melt-spun Bi-Sn Ribbons: Surface Composition Issues

2016 ◽  
pp. 3287-3297
Author(s):  
Tarek El Ashram ◽  
Ana P. Carapeto ◽  
Ana M. Botelho do Rego
Keyword(s):  
Chemical Composition ◽  
Optical Microscopy ◽  
Melt Spinning ◽  
Surface Composition ◽  
Electrochemical Process ◽  
Melt Spun ◽  
Bismuth Alloy ◽  
The One ◽  
Rapidly Solidified ◽  
Melt Spinning Technique

Tin-bismuth alloy ribbons were produced using melt-spinning technique. The two main surfaces (in contact with the rotating wheel and exposed to the air) were characterized with Optical Microscopy and AFM, revealing that the surface exposed to the air is duller (due to a long-range heterogeneity) than the opposite surface. Also the XPS chemical composition revealed many differences between them both on the corrosion extension and on the total relative amounts of tin and bismuth. For instance, for the specific case of an alloy with a composition Bi-4 wt % Sn, the XPS atomic ratios Sn/Bi are 1.1 and 3.7 for the surface in contact with the rotating wheel and for the one exposed to air, respectively, showing, additionally, that a large segregation of tin at the surface exists (nominal ratio should be 0.073). This segregation was interpreted as the result of the electrochemical process yielding the corrosion products.

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