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Effects of Bi2Se3 Amount in Thermoelectric Performance of Bi-2(TeSe)(3) Materials Fabricated by High-Energy Ball Milling

TitleEffects of Bi2Se3 Amount in Thermoelectric Performance of Bi-2(TeSe)(3) Materials Fabricated by High-Energy Ball Milling
Publication TypeJournal Article
Year of Publication2016
AuthorsRimal, P, Han, ST, Hong, SJ, Kim, HS, Cho, KY, Lee, I
JournalInternational Journal of Applied Ceramic Technology
Volume13
Pagination711-717
Date Published07
Type of ArticleArticle
ISBN Number1546-542X
Accession NumberWOS:000379945900013
Keywordsalloys, Bi-2(TeSe)(3) materials, bismuth-telluride, enhancement, figure-of-merit, gas-atomization, generation, high-energy ball milling, hot extrusion, Materials Science, Microstructure, thermoelectric properties, transport
Abstract

Amount of Bi2Se3 has significant role in controlling thermoelectric properties of n-type Bi-2(TeSe)(3) material. In this study, effects of Se alloying amount in Bi-2(TeSe)(3) thermoelectric materials fabricated by high-energy ball milling and spark plasma sintering were studied and compared with other fabrication methods. Amount of Bi2Se3 (5%, 10%, 15%, and 20%) did not have any significant effect over fabricated powder size, grains of consolidated bulks, and mechanical properties; however, electrical properties and thermoelectric efficiency were noticeably influenced. Both carrier concentration and carrier mobility decreased with increase in Se amount. In total, 20% Se alloying was effective in improving thermoelectric figure of merit ZT value by almost 40% compared with only 5% Se alloying.

DOI10.1111/ijac.12534
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Short TitleInt. J. Appl. Ceram. Technol.
Alternate JournalInt. J. Appl. Ceram. Technol.