The enhanced thermoelectric properties of Ba0.25Pb0.05Co4Sb11.5Te0.5 alloys prepared by HPHT at different pressure |
| |
| Authors: | L DengXP Jia TC SuYP Jiang SZ ZhengX Guo HA Ma |
| |
| Affiliation: | a National Laboratory of Superhard Materials, Jinlin University, Changchun 130012, Chinab Institute of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China |
| |
| Abstract: | Skutterudite Ba0.25Pb0.05Co4Sb11.5Te0.5 compounds with bcc crystal structure were prepared by high-pressure and high-temperature (HTHP) method. We have studied the structure and thermoelectric properties of Te-substituted partially filled Ba0.25Pb0.05Co4Sb11.5Te0.5 skutterudites which were synthesized at different pressure. The electrical resistivity, Seebeck coefficient and thermal conductivity of those samples were measured in the temperature range of 320-720 K. The combination of Ba and Pb fillers inside the voids of the skutterudite structure provided a broad range of resonant phonon scattering, so that a strong suppression in the lattice thermal conductivity was observed. A dimensionless thermoelectric figure of merit of 1.0 at 720 K was achieved for n-type Ba0.25Pb0.05Co4Sb11.5Te0.5 at last. |
| |
| Keywords: | Electrical properties HPHT Skutterudite CoSb3 |
| 本文献已被 ScienceDirect 等数据库收录！ |
