Structure of Bi2Se0.3Te2.7 alloy plates obtained by crystallization in a flat cavity by the Bridgman method

The property anisotropy in Bi 2 Se 0.3 Te 2.7 alloy is analyzed by constructing index surfaces for the thermoelectric figure of merit and thermal expansion coefficient. Texture is an important factor forming the property anisotropy and technological applicability of an ingot for fabricating modules....

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2017-08, Vol.51 (8), p.1021-1023
Main Authors: Demcheglo, V. D., Voronin, A. I., Tabachkova, N. Yu, Bublik, V. T., Ponomaryov, V. F.
Format: Article
Language:English
Subjects:
2016
Anisotropy
Bridgman method
Crystal growth
Crystallization
Design factors
Figure of merit
Ingots
Magnetic Materials
Magnetism
Modules
November 15–16
Physics
Physics and Astronomy
Plates (structural members)
St. Petersburg
Texture
Thermal expansion
Thermoelectric materials
Thermoelectricity
XV International Conference “Thermoelectrics and Their Applications—2016”
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Summary:The property anisotropy in Bi 2 Se 0.3 Te 2.7 alloy is analyzed by constructing index surfaces for the thermoelectric figure of merit and thermal expansion coefficient. Texture is an important factor forming the property anisotropy and technological applicability of an ingot for fabricating modules. The property anisotropy is analyzed based on studying the texture in ingots produced by the modified Bridgman method (thermoelectric plate growth in a flat cavity). Analysis of the texture shows that not only the crystallization rate, but also the crystallization cavity design is an important factor for the proposed crystallization method, affecting the formation of the thermoelectric-material structure. As the plate thickness is decreased by changing the heat removal conditions in a thin gap, a more perfect structure can be obtained.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782617080085