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In relation to this article, we declare that there is no conflict of interest.
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Received July 15, 2021
Accepted January 1, 2022
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Optimization of high-energy ball milling process for uniform p-type Bi-Sb-Te thermoelectric material powder

Energy Conversion Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Korea 1School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea
jelee@jnu.ac.kr
Korean Journal of Chemical Engineering, May 2022, 39(5), 1227-1231(5), 10.1007/s11814-022-1060-0
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Abstract

Ball milling is widely used for producing powders of thermoelectric materials owing to its simplicity and scalability. In this research, we investigated the particle shape and size in p-type Bi-Sb-Te materials.the best-known and only commercially available thermoelectric materials at present.after high-energy ball milling. Although Bi-Sb-Te materials are known to be brittle, some ductile properties, such as particle agglomeration and welding, were observed. To avoid an increase in particle size via welding and to obtain particles with highly uniform sizes, two-step ball milling was performed and particle sizes were analyzed. The ball-milled powder was consolidated and sintered, and the resulting pellets showed no crystallographic orientation and consequently exhibited uniform thermal and electrical conductivities regardless of measurement direction.

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