期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 39, 页码 9472-9478出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.07.040
关键词
Thermoelectrics; ZT; Chemical synthesis; Nanocompound; Bi2TeySe3-y
资金
- Ministry of Education, Science and Technology (MoEST) of Korea [11-EN-01]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [11-EN-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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). (C) 2011 Elsevier B.V. All rights reserved.
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