Abstract
High ZT values of nanostructured Bi 2-xSb xTe 3 for energy conversion are fabricated by hydrothermal methods followed by cold-pressing and sintering in an evacuated and encapsulated ampoule. We show that the sample with a nominal composition of x = 1.55 exhibits a dimensionless figure of merit ZT = 1.65 at 290 K and 1.75 at 270 K with significant 60-70% improvement of that of the commercial state-of-the-art Bi 2Te 3 materials around room temperature. The significant ZT improvement arises from the much-reduced thermal conductivity. The low thermal conductivity is mainly due to the increased phonon scattering in the nanostructured materials.
Original language | English |
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Pages (from-to) | 4825-4831 |
Number of pages | 7 |
Journal | Journal of Materials Chemistry |
Volume | 22 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2012 Mar 21 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Chemistry