Enhanced thermoelectric performance of lanthanum filled CoSb 3 synthesized under high pressure
| Autor: | Dongli Yu, Jianghua Li, Fengrong Yu, Bo Xu, Yongjun Tian, Chen Chen, Long Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Nanotechnology 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Thermal conductivity chemistry Mechanics of Materials High pressure 0103 physical sciences Thermoelectric effect Materials Chemistry engineering Lanthanum Skutterudite 0210 nano-technology Performance enhancement Filling fraction |
| Zdroj: | Journal of Alloys and Compounds. 699:751-755 |
| ISSN: | 0925-8388 |
| Popis: | n-type lanthanum filled CoSb3 skutterudites were successfully synthesized with high pressure synthesis. Structural, electrical, and thermoelectric properties were investigated. The synthesized LaxCo4Sb12 samples possess the skutterudite structure of Im 3 ¯ symmetry. The maximal filling fraction of La in high-pressure synthesized samples reaches 0.3, which is 30% higher than that of the ambient-pressure synthesized samples. Consequently, our samples show significantly enhanced thermoelectric properties. The power factor as high as 4600 μWm−1K−2 is reached for the optimal La0.29Co4Sb12 sample. Combined with the greatly suppressed thermal conductivity, the highest ZT of 1.06 is achieved at 863 K for La0.29Co4Sb12. Our results indicate the advantage of high pressure to increase the filling fraction, which benefits the thermoelectric performance enhancement of La-filled CoSb3 skutterudites. |
| Databáze: | OpenAIRE |
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