Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites
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 thermoelectri...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/3/260 |
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| author | Farah El-Makaty Abdel Magid Hamouda Anas Abutaha Khaled Youssef |
| author_facet | Farah El-Makaty Abdel Magid Hamouda Anas Abutaha Khaled Youssef |
| author_sort | Farah El-Makaty |
| collection | DOAJ |
| description | 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-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposite. Ultra-high pressure, up to 1.5 GPa, is considered for the first time for consolidating Bi<sub>2</sub>(Te,Se)<sub>3</sub> 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 Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> composition. |
| first_indexed | 2024-03-08T03:51:28Z |
| format | Article |
| id | doaj.art-262d6a2ca86c417caac10b601041182b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-08T03:51:28Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-262d6a2ca86c417caac10b601041182b2024-02-09T15:19:22ZengMDPI AGNanomaterials2079-49912024-01-0114326010.3390/nano14030260Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> NanocompositesFarah El-Makaty0Abdel Magid Hamouda1Anas Abutaha2Khaled Youssef3Mechanical and Industrial Engineering Department, Qatar University, Doha 2713, QatarMechanical and Industrial Engineering Department, Qatar University, Doha 2713, QatarHBKU Core Labs, Hamad Bin Khalifa University, Doha 34110, QatarMaterials Science and Technology Graduate Program, Department of Physics and Materials Science, Qatar University, Doha 2713, QatarHot 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-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> nanocomposite. Ultra-high pressure, up to 1.5 GPa, is considered for the first time for consolidating Bi<sub>2</sub>(Te,Se)<sub>3</sub> 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 Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> composition.https://www.mdpi.com/2079-4991/14/3/260thermoelectricn typemechanical millinghot pressingbismuth telluridenanocomposite |
| spellingShingle | Farah El-Makaty Abdel Magid Hamouda Anas Abutaha Khaled Youssef Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites Nanomaterials thermoelectric n type mechanical milling hot pressing bismuth telluride nanocomposite |
| title | Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites |
| title_full | Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites |
| title_fullStr | Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites |
| title_full_unstemmed | Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites |
| title_short | Optimization of the Consolidation Parameters for Enhanced Thermoelectric Properties of Gr-Bi<sub>2</sub>Te<sub>2.55</sub>Se<sub>0.45</sub> Nanocomposites |
| title_sort | optimization of the consolidation parameters for enhanced thermoelectric properties of gr bi sub 2 sub te sub 2 55 sub se sub 0 45 sub nanocomposites |
| topic | thermoelectric n type mechanical milling hot pressing bismuth telluride nanocomposite |
| url | https://www.mdpi.com/2079-4991/14/3/260 |
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