NDLI: Investigation of Thermoelectric Properties with Dispersion of Fe$_{2}$O$_{3}$ and Fe-85Ni Nanospheres in Bi$_{0.5}$Sb$_{1.5}$Te$

Content Provider	Springer Nature Link
Author	Yoon, Sang Min Dharmaiah, Peyala Kim, Hyo Seob Lee, Chul Hee Hong, Soon Jik Koo, Jar Myung
Copyright Year	2016
Abstract	In this work, we fabricated Bi$_{0.5}$Sb$_{1.5}$Te$_{3}$ thermoelectric alloys using the mass-production technique, and subsequently Fe$_{2}$O$_{3}$ and Fe-85Ni alloy nanoparticles were dispersed in the matrix by high energy ball milling and consolidated using spark plasma sintering technique. The influence of Fe$_{2}$O$_{3}$ and Fe-85Ni alloy spherical nanoparticles in Bi$_{0.5}$Sb$_{1.5}$Te$_{3}$ (BST) matrix on thermoelectric transport properties has been investigated. The x-ray diffraction and scanning electron microscopy results show that the nanoparticles were dispersed in the matrix. The spark plasma sintered bulk BST/Fe$_{2}$O$_{3}$ composite sample exhibited high Seebeck coefficient which was 39% higher than the bare BST due to low carrier concentration and a significant reduction in the thermal conductivity (38%) owing to enhanced carrier scattering by the dispersed nanoparticles compared to that of the bare BST sample. As a result, the maximum ZT values for the BST, BST/Fe$_{2}$O$_{3}$, and BST/Fe-85Ni samples were found as 1.17, 0.98, and 0.88 at 375 K, respectively. Micro Vickers hardness of BST/Fe$_{2}$O$_{3}$ and BST/Fe-85Ni composite samples was significantly enhanced compared to bare Bi$_{0.5}$Sb$_{1.5}$Te$_{3}$ sample.
Starting Page	2770
Ending Page	2777
Page Count	8
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	46
Issue Number	5
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2016-09-27
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bismuth telluride gas-atomization spark plasma sintering thermoelectric properties Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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