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Thermoelectric properties of SnzCo8Sb24 skutterudites |
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| Authors: | Ramesh Chandra Mallik V Damodara Das Il-Ho Kim |
| Institution: | a Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University, 123 Geomdan-ri, Iryu-myeon, Chungju, Chungbuk 380-702, Republic of Korea b Department of Materials Science and Engineering/ReSEM, Chungju National University, 123 Geomdan-ri, Iryu-myeon, Chungju, Chungbuk 380-702, Republic of Korea c Department of Physics, Indian Institute of Technology, Madras, Chennai 600 036, India |
| Abstract: | Sn-filled CoSb3 skutterudite compounds were synthesized by the induction melting process. Formation of a single δ-phase of the synthesized materials was confirmed by X-ray diffraction analysis. The temperature dependences of the Seebeck coefficient, electrical resistivity and thermal conductivity were examined in the temperature range of 300-700 K. Positive Seebeck and Hall coefficients confirmed p-type conductivity. Electrical resistivity increased with increasing temperature, which shows that the Sn-filled CoSb3 skutterudite is a degenerate semiconductor. The thermal conductivity was reduced by Sn-filling because the filler atoms acted as phonon scattering centers in the skutterudite lattice. The lowest thermal conductivity was achieved in the composition of Sn0.25Co8Sb24. |
| Keywords: | 61 10 Nz 72 20 Pa 73 50 Lw 74 25 Fy |
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