Thermoelectric transport properties of bismuth telluride bulk materials fabricated by ball milling and spark plasma sintering
| Autor: | Chii Shyang Hwang, Jie Ren Ku, Ya Wen Chou, Ming Shan Jeng, Wei Sheng Su, Chia Hung Kuo |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Dopant Mechanical Engineering Metallurgy Metals and Alloys Spark plasma sintering Power factor Thermoelectric materials chemistry.chemical_compound chemistry Mechanics of Materials Electrical resistivity and conductivity Thermoelectric effect Materials Chemistry Bismuth telluride Composite material Ball mill |
| Zdroj: | Journal of Alloys and Compounds. 496:687-690 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2010.02.171 |
| Popis: | Dense bismuth telluride (Bi 2 Te 3 ) bulk materials with randomly packed grains were prepared using attrition milling and spark plasma sintering (SPS). Experimental results indicate that the high energy ball milling produces donor-like carriers in Bi 2 Te 3 samples and enhances thermoelectric transport properties such as carrier concentration, electrical conductivity and power factor. The maximum power factor of 1 mW m −1 K −2 was obtained at 500 K for the 3 h-milled Bi 2 Te 3 sample sintered at 573 K. Results of this study demonstrate that adequately controlling the milling time can enhance the thermoelectric performance of Bi 2 Te 3 bulk materials without adding dopants. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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