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- Title
Effect of Heat Treatment on the Thermoelectric Properties of Bismuth-Antimony-Telluride Prepared by Mechanical Deformation and Mechanical Alloying.
- Authors
Lee, Deuk-Hee; Lee, Jae-Uk; Jung, Sung-Jin; Baek, Seung-Hyub; Kim, Ju-Heon; Kim, Dong-Ik; Hyun, Dow-Bin; Kim, Jin-Sang
- Abstract
In this work, p-type 20%BiTe-80%SbTe bulk thermoelectric (TE) materials were prepared by mechanical deformation (MD) of pre-melted ingot and by mechanical alloying (MA) of elemental Bi, Sb, and Te granules followed by cold-pressing. The dependence on annealing time of changes of microstructure and TE properties of the prepared samples, including Seebeck coefficient, electrical resistivity, thermal conductivity, and figure-of-merit, was investigated. For both samples, saturation of the Seebeck coefficient and electrical resistivity were observed after annealing for 1 h at 380°C. It is suggested that energy stored in samples prepared by both MA and MD facilitated their recrystallization within short annealing times. The 20%BiTe-80%SbTe sample prepared by MA followed by heat treatment had higher a Seebeck coefficient and electrical resistivity than specimens fabricated by MD. Maximum figures-of-merit of 3.00 × 10/K and 2.85 × 10/K were achieved for samples prepared by MA and MD, respectively.
- Subjects
HEAT treatment; ANTIMONY telluride; DEFORMATIONS (Mechanics); MECHANICAL alloying; SEEBECK coefficient; ELECTRICAL resistivity
- Publication
Journal of Electronic Materials, 2014, Vol 43, Issue 6, p2255
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-014-3037-1