Synthesis and thermoelectric properties of CoSb3/WO3 thermoelectric composites |
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| Affiliation: | 1. Dept. of Materials Science and Engineering, KTH Royal Institute of Technology, Brinellvagen 23, SE-10044 Stockholm, Sweden;2. Dept. of Materials and Nano Physics, KTH Royal Institute of Technology, Isafjordsgatan 22, SE-16440, Kista, Stockholm, Sweden;3. Dept. of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden;4. Dept. of Energy Conversion and Storage, Technical University of Denmark, Denmark;1. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204, USA;2. GMZ Energy, Inc., Waltham, MA 02453, USA;1. National Key Laboratory for Precision Hot Processing of Metals and School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. State Key Laboratory of Advance Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;1. Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, NSW 2500, Australia;2. School of Material Science and Engineering, Northeastern University, Shenyang 110819, PR China;3. Superconducting Materials Research Center, Northwest Institute for Nonferrous Metal Research, Xian 710016, China;4. The Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2232, Australia;5. School of Physics, Shandong University, Jinan, Shandong 250100, PR China;6. Electron Microscopy Centre, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, NSW 2500, Australia;7. School of Mathematical and Physical Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia |
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| Abstract: | In this study, nano-sized WO3 powder was dispersed into CoSb3 powder by ball milling and CoSb3/WO3 thermoelectric composites were fabricated using hot-pressing sintering. The results showed that the WO3 phase distributed uniformly in the form of clusters and the average size of cluster was lower than 4 μm. As the content of WO3 increased, the electrical conductivity and Seebeck coefficient of CoSb3/WO3 composites decreased. The thermal conductivity of composites decreased obviously which resulted from the phonon scattering by the WO3 inclusions locating on the grain boundaries of CoSb3 matrix. The highest thermoelectric figure of merit ZT = 0.40 was achieved at 650 K for CoSb3/2%WO3 composite. |
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| Keywords: | A Composites B Thermoelectric properties C Sintering |
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