Thermoelectric properties of (Bi0.25Sb0.75)(2)Te-3 prepared by mechanical alloying and hot pressing
- Authors
- Jung, BY; Oh, TS; Hyun, DB; Shim, JD
- Issue Date
- Jul-1997
- Publisher
- KOREAN PHYSICAL SOC
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.31, no.1, pp.219 - 222
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 31
- Number
- 1
- Start Page
- 219
- End Page
- 222
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/27647
- ISSN
- 0374-4884
- Abstract
- The thermoelectric properties of polycrystalline (Bi0.25Sb0.75)(2)Te-3 fabricated by mechanical alloying and hot pressing have been investigated. (Bi-0.25 Sb-0.75)(2)Te-3 was formed by mechanical alloying of elemental Pi, Sb, and Te granules for 5 hours at ball-to-material weight ratio of 5:1. The figure-of-merit of (Bi0.25Sb(0.75))(2)Te-3, measured at 300 K, increased from 0.93x10(-3)/K to 2.8x10(-3)/K with increasing hot-pressing temperature from 300 degrees C to 550 degrees C. Optimization of the figure-of-merit (similar to 3.0x10(-3)/K) could be achieved by a compositional change to (Bi0.2Sb0.8)(2)Te-3 lather than by impurity doping to (Bi0.25Sb0.75)(2)Te-3.
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Collections - College of Engineering > Materials Science and Engineering Major > 1. Journal Articles
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