About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Alloys and Compounds for Thermoelectric and Solar Cell Applications X
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Presentation Title |
Achieving High Thermoelectric Performance in Hierarchical Structured Bi0.5Sb1.5Te3 Alloys via Controlling the Hot Pressing Temperature |
Author(s) |
Peyala Dharmaiah, Sungjae Jo, Yeeun Lee, Soon-Jik Hong |
On-Site Speaker (Planned) |
Peyala Dharmaiah |
Abstract Scope |
Over the last decades, intensive research has been devoted to optimize and enhance the thermoelectric (TE) properties of BiSbTe-based materials for energy generation and solid-state cooling applications. However, commercial applications are constrained by the low efficiency of TE materials. In this work, an economically viable and single-step water atomization process is employed to fabricate BiSbTe-Cu based alloy powder followed by hot pressing (HP) at different temperatures. The electrical conductivity was increased significantly with increasing HP temperature due to the simultaneous increase of carrier concentration and mobility, while the Seebeck coefficient was nearly similar. Consequently, the maximum power factor of 4.28 mW/mK2 at 300 K was obtained for the perpendicular direction of HP490 sample. A peak ZT of 1.39 was attained at 400 K for the HP490 sample. This remarkable enhancement in ZT for the HP490 sample is due to enhanced power factor and reasonable reduction of thermal conductivity. |
Proceedings Inclusion? |
Planned: |
Keywords |
Electronic Materials, Solidification, Powder Materials |