A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance
Autor: | Jong Sook Kim, Dong Hwan Kim, Hoyoung Kim, Jong Shik Chung, Yoon Soo Han, Cham Kim |
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Rok vydání: | 2011 |
Předmět: |
Chemistry
Mechanical Engineering Metals and Alloys Spark plasma sintering Mineralogy Sintering chemistry.chemical_element Thermoelectric materials Bismuth chemistry.chemical_compound Chemical engineering Mechanics of Materials Seebeck coefficient Selenide Thermoelectric effect Materials Chemistry Tellurium |
Zdroj: | Journal of Alloys and Compounds. 509:9472-9478 |
ISSN: | 0925-8388 |
DOI: | 10.1016/j.jallcom.2011.07.040 |
Popis: | A bismuth tellurium selenide (Bi2TeySe3−y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi2Te2.7Se0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT). |
Databáze: | OpenAIRE |
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