Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi2Te2.55Se0.45 Nanocomposites
| Author | El-Makaty, Farah |
| Author | Hamouda, Abdel M. |
| Author | Abutaha, Anas |
| Author | Youssef, Khaled |
| Available date | 2024-11-13T05:32:17Z |
| Publication Date | 2024 |
| Publication Name | Nanomaterials |
| Resource | Scopus |
| Identifier | http://dx.doi.org/10.3390/nano14030260 |
| ISSN | 20794991 |
| Abstract | Hot pressing represents a promising consolidation technique for ball-milled bismuth telluride alloys, yet deep investigations are needed to understand its effect on the thermoelectric properties. This paper studies the effect of hot-pressing parameters (temperature and pressure) on the thermoelectric properties of the n-type Gr-Bi2Te2.55Se0.45 nanocomposite. Ultra-high pressure, up to 1.5 GPa, is considered for the first time for consolidating Bi2(Te,Se)3 alloys. Results from this study show that increasing the temperature leads to changes in chemical composition and causes noticeable grain growth. On the contrary, increasing pressure mainly causes improvements in densification. Overall, increments in these two parameters improve the ZT values, with the temperature parameter having a higher influence. The highest ZT of 0.69 at 160 °C was obtained for the sample hot-pressed at 350 °C and 1 GPa for 5 min, which is indeed an excellent and competitive value when compared with results reported for this n-type Bi2Te2.55Se0.45 composition. |
| Sponsor | This work was funded by Grant No. NPRP10-0206-170366 and GSRA8-L-1-0414-21013 from the Qatar National Research Fund (a member of the Qatar Foundation). The statements made herein are solely the responsibility of the authors. Open Access funding is provided by the Qatar National Library. The authors acknowledge the technical support from the Center of Advanced Materials (CAM) and the Central Lab Unit (CLU) at Qatar University and the HBKU Core Labs at Hamad Bin Khalifa University. |
| Language | en |
| Publisher | Multidisciplinary Digital Publishing Institute (MDPI) |
| Subject | bismuth telluride hot pressing mechanical milling n type nanocomposite thermoelectric |
| Type | Article |
| Issue Number | 3 |
| Volume Number | 14 |
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