Power factor improvement in hydrothermally synthesized Bi{sub 2-x}Sb{sub x}Te{sub 3} (x=1.5) - carbon sphere composites
- Department of Physics, National Changhua University of Education, 1 Jin Der Road, Changhua 500, Taiwan, ROC (China)
- Department of Medical Research, Chung Shan Medical University Hospital, No. 110, Sec. 1, Jianguo N. Rd., Taichung 40201, Taiwan, ROC (China)
We report fabrication of compacted Bi{sub 0.5}Sb{sub 1.5}Te{sub 3} composites by adding 1 wt% of carbon spheres in the hydrothermal synthesis. The processing parameter of sintering temperature is investigated in order to optimize the thermoelectric power factor of pressed Bi{sub 0.5}Sb{sub 1.5}Te{sub 3} composites. As a result, we find that the composite sintered at 360 Degree-Sign C shows the best power factor performance among the composites and has a largest power factor of 15.4 {mu}W/cm K{sup 2} at 205 K and 13.5 {mu}W/cm K{sup 2} at 290 K. When compared with the samples without addition of carbon sphere in the hydrothermal synthesis, the composites sintered at 340 Degree-Sign C and 360 Degree-Sign C both surpass the largest power factor of 12.1 {mu}W/cm K{sup 2} at 280 K and 11.9 {mu}W/cm K{sup 2} at 290 K for the 340 Degree-Sign C-sintered counterpart. - Graphical abstract: Compacted Bi{sub 0.5}Sb{sub 1.5}Te{sub 3-{delta}} composites obtained by adding 1 wt% of carbon spheres in the hydrothermal synthesis. The composites sintered at 340 Degree-Sign C and 360 Degree-Sign C both surpass the largest power factor of 12.1 {mu}W/cm K{sup 2} at 280 K and 11.9 {mu}W/cm K{sup 2} at 290 K for the 340 Degree-Sign C-sintered counterpart. Highlights: Black-Right-Pointing-Pointer Fabrication of Bi{sub 0.5}Sb{sub 1.5}Te{sub 3-{delta}} composites. Black-Right-Pointing-Pointer Addition of 1 wt% carbon spheres in the hydrothermal synthesis. Black-Right-Pointing-Pointer Investigation of sintering temperature using encapsulating-and-sintering techniques. Black-Right-Pointing-Pointer 360 Degree-Sign C-sintered composite showing the largest power factor of 15.4 {mu}W/cm K{sup 2} at 205 K. Black-Right-Pointing-Pointer 10-60% improvement over the counterpart without adding carbon spheres.
- OSTI ID:
- 22149812
- Journal Information:
- Journal of Solid State Chemistry, Vol. 193; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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