Effect of Te Doping on Thermoelectric Property of SryCo4Sb12-xTex Compounds

doi:10.3724/SP.J.1077.2009.00803

Abstract

Abstract: Skutterudite compounds, Sr_yCo₄Sb_12-xTe_x, were synthesized by melting method and SPS method, the thermal and electrical properties were measured in the temperature range from 300K to 850K. Both carrier concentration and electrical conductivity of Sr_yCo₄Sb_12-xTe_x compounds are higher than those of the matrix with similar Sr filling fraction. The magnitude of Seebeck coefficient is increased in comparison with that of matrix with similar carrier concentration, especially at high temperature. Lattice thermal conductivity is further decreased due to the extra electron-phonon scattering mode introduced by Te doping. The maximum ZT value of 1.0 is obtained for Sr_0.18Co₄Sb_11.95Te_0.05 at 850K, which is improved by 35% compared with that of Sr_0.17Co₄Sb₁₂.

Key words: Te doping, Sr_yCo₄Sb_12-xTe_x compound, thermoelectric transport properties

CLC Number:

O482
TN37

ZHAO Xue-Ying,BAI Sheng-Qiang,LI Xiao-Ya,ZHOU Yan-Fei,CHEN Li-Dong. Effect of Te Doping on Thermoelectric Property of Sr_yCo₄Sb_12-xTe_x Compounds[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00803.

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Effect of Te Doping on Thermoelectric Property of Sr_yCo₄Sb_12-xTe_x Compounds

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