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Temperature Dependent Structure Stability Studies on Thermoelectric Yb0.025Fe0.3Co0.7Sb3

  • Mohsen Y. Tafti (a1), Mohsin Saleemi (a1) (a2), Mats Johnsson (a2), Alexandre Jacquot (a3) and Muhammet S. Toprak (a1)...


Depending on their application temperature thermoelectric (TE) materials are classified in three main categories; as low (up to 250°C), intermediate (up to 550°C) and high (above 600°C) temperature. Currently, Skutterudites (CoSb3) based materials have shown promising results in the intermediate temperature range (300-500°C). This family of material is highly suitable for automotive, marine transportation and industrial power generation applications to recover the waste heat from the exhaust and generate electricity. Conventional TE modules need p- and n-type semiconductor materials and for the skutterudite family, iron (Fe) has proven to be among the best candidates for the substitution of cobalt sites. Additionally, rare earths are introduced as rattlers in the crystal cages of the skutterudite to decrease the thermal conductivity, thus improving the figure of merit ZT of the TE material. For practical application for device fabrication, stability of these materials is of great importance. Compositional stability is being addressed as the material decomposes above certain temperature. Temperature dependent x-ray diffraction study was performed on Fe substituted, Yb-filled skutterudites, using Beam Line I711 at MAX LAB, to observe the crystal structure as a function of temperature. Diffraction patterns were collected from room temperature up to 500°C by utilizing Huber furnace. The results show success in filling process showing almost 80% reduction of the thermal conductivity from bulk. Additionally the thermal expansion coefficient value was within the average value for skutterudites which proves practical application of this powder for industrial applications.



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1. Nolas, G.S., Morelli, D.T., and Tritt, T.M., Annual Review of Materials Science, 1999. 29(1): p. 89116. doi: 10.1146/annurev.matsci.29.1.89
2. Muhammed, M. and Toprak, M., Nanostructured Skutterudites, in Thermoelectrics Handbook: Macro to Nano. 2006, CRC Press.
3. Rowe, D.M., Thermoelectrics Handbook: Macro to Nano. 2010: CRC Press.
4. Zhou, C., Morelli, D.T., Zhou, X., G.Wang, , & Uher, C., Intermetallics, 2011. 19(10): p. 13901393. doi: 10.1016/j.intermet.2011.04.015
5. Lee, W.M., Shin, D.-K., and Kim, I.-H., Journal of Electronic Materials, 2014. p. 16. doi: 10.1007/s11664-014-3401-1
6. Liu, R., Cho, J.Y., Yang, J., Zhang, W., Chen, L., Journal of Materials Science & Technology, 2014. doi: 10.1016/j.jmst.2014.05.007
7. Park, K.H., Seo, W.S., Shin, D.K., Kim, I.H., Journal of the Korean Physical Society, 2014. 65(4): p. 491495. doi: 10.3938/jkps.65.491
8. Saleemi, M., Tafti, M. Y., Toprak, M. S., Stingaciu, M., Johnsson, M., Jägle, M., Jacquot, A. and Muhammed, M. (2013). MRS Proceedings, 1490, pp 121126. doi:10.1557/opl.2012.1643.
9. Cerenius, Y., Ståhl, K., Svensson, L. A., Ursby, T., Oskarsson, Å., Albertsson, J. and Liljas, A., Journal of Synchrotron Radiation, 2000. 7(4): p. 203208. doi: 10.1107/S0909049500005331
10. Rogl, G., Grytsiv, A., Bauer, E., Rogl, P., Zehetbauer, M., Intermetallics, 2010. 18(1): p. 5764. doi: 10.1016/j.intermet.2009.06.005
11. Khana, A., Saleemi, M., Johnsson, M., Hand, L., Nong, N.V., Muhammed, M., Toprak, M.S. (2014). Journal of Alloys and Compounds, 612, 293300. doi: 10.1016/j.jallcom.2014.05.119
12. Toprak, M., Y.Z., Muhammed, M., A Zakhidov, A., H Baughman, R., Khayrullin, I., 18th International Conference on Thermoelectrics, 1999. doi: 10.1109/ICT.1999.843410
13. Tafti, M. Y., Saleemi, M., Jacquot, A., Jägle, M., Muhammed, M. and Toprak, M. S., MRS Proceedings, 2013. 1543: p. 105110. doi: 10.1557/opl.2013.947
14. Rogl, G., Zhang, L., Rogl, P., Grytsiv, A., Falmbigl, M., Rajs, D., Kriegisch, M., Müller, H., Bauer, E., Koppensteiner, J., Schranz, W., Zehetbauer, M., Henkie, Z. and Maple, M. B.. (2010). Journal of Applied Physics, 107(4), 043507. doi: 10.1063/1.3284088



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