Abstract
Single-phase filled skutterudite compounds, CeyFexCo4−xSb12 (x = 0 to 3.0, y = 0 to 0.74), were synthesized by a melting method. The effects of Fe content and Ce filling fraction on the thermoelectric properties of CeyFexCo4−xSb12 were investigated. The lattice thermal conductivity of Ce-saturated CeyFexCo4−xSb12, y being at the maximum corresponding to x, decreased with increasing Fe content (x) and reached its minimum at about x = 1.5. When x was 1.5, lattice thermal conductivity decreased with increasing Ce filling fraction till y = 0.3 and then began to increase after reaching the minimum at y = 0.3. Hole concentration and electrical conductivity of Cey Fe1.5Co2.5Sb12 decreased with increasing Ce filling fraction. The Seebeck coefficient increased with increasing Ce filling fraction. The greatest dimensionless thermoelectric figure of merit T value of 1.1 was obtained at 750 K for the composition of Ce0.28Fe1.52Co2.48Sb12.
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J-P. Fleurial, T. Caillat, and A. Borshchevsky, in Proc. 16th Inter. Conf. on Thermoelectrics, (IEEE, Piscataway, NJ, 1997), p. 1.
J. Ackermann and A. Wold, J. Phys. Chem. Solid 38, 1013 (1977).
E. Arushanov, K. Fess, W. Kaefer, Ch. Kloc, and E. Bucher, Phys. Rev. B 56, 1911 (1997).
T. Caillat, J-P. Fleurial, and A. Borshchevsky, J. Crystal Growth 166, 722 (1996).
T. Caillat, A. Borshchevsky, and J-P. Fleurial, J. Appl. Phys. 80, 4442 (1996).
D.T. Morelli, T. Caillat, J-P. Fleurial, A. Borshchevsky, J. Vandersande, B. Chen, and C. Uher, Phys. Rev. B 51, 9622 (1995).
D. Mandrus, A. Migliori, T.W. Darling, M.F. Hundley, E.J. Peterson, and J.D. Thompson, Phys. Rev. B 52, 4926 (1995).
J.W. Sharp, E.C. Jones, R.K. Williams, P.M. Martin, and B.C. Sales, J. Appl. Phys. 78, 1013 (1995).
A. Borshchevsk, J-P. Fleurial, C.E. Allevato, and T. Caillat, in Proc. 13th Inter. Conf. on Thermoelectrics, AIP press No. 316, 3 (1994).
A. Borshchevsky, J-P. Fleurial, and T. Caillat, in Proc. 15th Inter. Conf. on Thermoelectrics, (IEEE, Piscataway, NJ, 1996), p. 112.
S. Katsuyama, Y. Kanayama, M. Ito, K. Majima, and H. Nagai, in Proc. 17th Inter. Conf. on Thermoelectrics, (IEEE, Piscataway, NJ, 1998), p. 342.
B.C. Sales, D. Mandrus, and R.K. Williams, Science 272, 1325 (1996).
B.C. Sales, D. Mandrus, B.C. Chakoumakos, V. Keppens, and J.R. Thompson, Phys. Rev. B 56, 15081 (1997).
B.X. Chen, J-H. Xu, C. Uher, D.T. Morelli, G.P. Meisner, J-P. Fleurial, T. Caillat, and A. Borshchevsky, Phys. Rev. B 55, 1476 (1997).
X.F. Tang, L.D. Chen, T. Goto, and T. Hirai, J. Japan Inst. Metals 63, 1412 (1999).
D.T. Morelli, G.P. Meisner, B.X. Chen, S.Q. Hu, and C. Uher, Phys. Rev. B 56, 7376 (1997).
H. Okamoto, J. Phase Equilibria 12, 244 (1991).
G.S. Nolas, J.L. Cohn, and G.A. Slack, Phys. Rev. B 58, 164 (1998).
B.C. Chakoumakos, B.C. Sales, D. Mandrus, and V. Keppens, Acta Cryst. B 55, 341 (1999).
B.C. Sales, B.C. Chakoumakos, and D. Mandrus, J. Solid State Chem. 146, 528 (1999).
J.H. Yang, Ph.D. Thesis, University of Michigan, Ann Arbor, MI (2000).
L. Nodstrom and D.J. Singh, Phys. Rev. B 53, 1103 (1996).
L. Chen, T. Goto, J. Li, and T. Hirai, Mater. Trans. JIM 37, 1182 (1996).
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Tang, X., Chen, L., Goto, T. et al. Effects of Ce filling fraction and Fe content on the thermoelectric properties of Co-rich CeyFexCo4−xSb12 . Journal of Materials Research 16, 837–843 (2001). https://doi.org/10.1557/JMR.2001.0109
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DOI: https://doi.org/10.1557/JMR.2001.0109