Effects of Bi2Se3 Amount in Thermoelectric Performance of Bi2(TeSe)3 Materials Fabricated by High‐Energy Ball Milling |
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| Authors: | Pradip Rimal Seung Tek Han Soon‐Jik Hong Hyo‐Seob Kim Kuk Young Cho Ilsueuk Lee |
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| Affiliation: | 1. Division of Advanced Materials Engineering, Kongju National University, Cheonan, Korea;2. Metals Development, Ames Laboratory, Iowa State University, Ames, Iowa;3. Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, Korea;4. Korea National Cleaner Production Center, Korea Institute of Industrial Technology (KITECH), Seoul, Korea |
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| Abstract: | Amount of Bi2Se3 has significant role in controlling thermoelectric properties of n‐type Bi2(TeSe)3 material. In this study, effects of Se alloying amount in Bi2(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. |
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| Keywords: | Bi2(TeSe)3 materials high‐energy ball milling microstructure thermoelectric properties |
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