Effects of high pressure sintering on the microstructure and thermoelectric properties of BiCuSeO
- 15 December 2016
- journal article
- research article
- Published by Taylor & Francis in High Pressure Research
- Vol. 37 (1) , 36-45
Abstract
Polycrystalline BiCuSeO oxides are prepared by solid-state reaction followed by pressureless sintering (PLS) and high pressure sintering (HPS) methods. Both the experimental results and the density functional theory calculations indicate that the crystal defect concentrations of BiCuSeO can be reduced under the effect of high pressure. By comparing with the PLS sample, a larger power factor and a lower thermal conductivity can be obtained for the HPS sample. The maximum figure of merit ZT∼0.4 @ 800 K was obtained for the HPS sample, which is about 3 times higher than the PLS sample. These results indicate that the effect of high pressure is beneficial to modifying the microstructure and improving the thermoelectric performance of BiCuSeO oxyselenide.Keywords
Funding Information
- National Natural Science Foundation of China (11534003)
- Shanghai Entry-Exit Inspection and Quarantine Bureau (HK021-2014)
- General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China (2012IK049)
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