Advanced thermoelectric for waste heat harvesting
High entropy engineering has been observed to be able to extend the limits of optimization in thermoelectric performance. This technique involves introducing different atomic species to manipulate the configurational entropy of a material, resulting in the formation of a high entropy alloy. In this...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2022
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| Online Access: | https://hdl.handle.net/10356/156297 |
| _version_ | 1811682110553980928 |
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| author | Tan, Justin Jia Jun |
| author2 | Alex Yan Qingyu |
| author_facet | Alex Yan Qingyu Tan, Justin Jia Jun |
| author_sort | Tan, Justin Jia Jun |
| collection | NTU |
| description | High entropy engineering has been observed to be able to extend the limits of optimization in thermoelectric performance. This technique involves introducing different atomic species to manipulate the configurational entropy of a material, resulting in the formation of a high entropy alloy. In this study, pellets of AgSnSbSe1.5PbxTex+1.5 were synthesized at varying PbTe concentration to analyse the effects of the dopant concentration on the thermoelectric properties. Pellets were thermal annealed and sintered with spark plasma sintering (SPS) before the thermoelectric properties were measured using the ULVAC ZEM-3 machine and the laser flash analysis (LFA) method. The structure and morphology of the pellets were characterized with the Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). After measurements, the composition of AgSnSbSe1.5Te1.5 + 10 % PbTe had the most favourable modifications in terms of its electrical and thermal conductivity. From the temperature range of 423 – 773 K, it displayed a high average power factor and ZTave of ~8.6 µW·cm-1·K-2 and ~0.69 accordingly. A peak ZT of ~0.80 was measured at the temperature of 723 K. |
| first_indexed | 2024-10-01T03:51:38Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/156297 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:51:38Z |
| publishDate | 2022 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1562972022-04-11T13:07:50Z Advanced thermoelectric for waste heat harvesting Tan, Justin Jia Jun Alex Yan Qingyu School of Materials Science and Engineering AlexYan@ntu.edu.sg Engineering::Materials::Testing of materials Engineering::Materials::Metallic materials::Alloys Engineering::Materials::Material testing and characterization High entropy engineering has been observed to be able to extend the limits of optimization in thermoelectric performance. This technique involves introducing different atomic species to manipulate the configurational entropy of a material, resulting in the formation of a high entropy alloy. In this study, pellets of AgSnSbSe1.5PbxTex+1.5 were synthesized at varying PbTe concentration to analyse the effects of the dopant concentration on the thermoelectric properties. Pellets were thermal annealed and sintered with spark plasma sintering (SPS) before the thermoelectric properties were measured using the ULVAC ZEM-3 machine and the laser flash analysis (LFA) method. The structure and morphology of the pellets were characterized with the Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). After measurements, the composition of AgSnSbSe1.5Te1.5 + 10 % PbTe had the most favourable modifications in terms of its electrical and thermal conductivity. From the temperature range of 423 – 773 K, it displayed a high average power factor and ZTave of ~8.6 µW·cm-1·K-2 and ~0.69 accordingly. A peak ZT of ~0.80 was measured at the temperature of 723 K. Bachelor of Engineering (Materials Engineering) 2022-04-11T13:07:50Z 2022-04-11T13:07:50Z 2022 Final Year Project (FYP) Tan, J. J. J. (2022). Advanced thermoelectric for waste heat harvesting. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/156297 https://hdl.handle.net/10356/156297 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Materials::Testing of materials Engineering::Materials::Metallic materials::Alloys Engineering::Materials::Material testing and characterization Tan, Justin Jia Jun Advanced thermoelectric for waste heat harvesting |
| title | Advanced thermoelectric for waste heat harvesting |
| title_full | Advanced thermoelectric for waste heat harvesting |
| title_fullStr | Advanced thermoelectric for waste heat harvesting |
| title_full_unstemmed | Advanced thermoelectric for waste heat harvesting |
| title_short | Advanced thermoelectric for waste heat harvesting |
| title_sort | advanced thermoelectric for waste heat harvesting |
| topic | Engineering::Materials::Testing of materials Engineering::Materials::Metallic materials::Alloys Engineering::Materials::Material testing and characterization |
| url | https://hdl.handle.net/10356/156297 |
| work_keys_str_mv | AT tanjustinjiajun advancedthermoelectricforwasteheatharvesting |