High pressure synthesis and thermoelectric properties of micro/nano structures CoSb3

作者：Deng, L.^*; Ni, Jing; Qin, J. M.; Jia, X. P.^*

来源：Journal of Solid State Chemistry, 2017, 255: 129-132.

DOI：10.1016/j.jssc.2017.08.006

• Thermoelectric properties
• Seebeck coefficient
• Thermal conductivity
• HPHT

Nano-particle and defect have been proved to be effective in depressing the lattice thermal conductivity and improving the performance of thermoelectric materials. In this work, In0.5SnxCo4Sb12 were prepared using a high pressure and high temperature (HPHT) method, In and Sn was assumed that In plays the role of a filler and occupies the Sb-icosahedron voids. Doping of In and Sn results in the defects, nanostructuring, and mesoscale structuring were all combined into a single skutterudite matrix. The thermoelectric properties were measured in the temperature range of 321-710 K. As expected, with the synthetic pressures increased, the thermal conductivity of samples improved significantly. The minimum value of In0.5SnxCo4Sb12 synthesized at 3.8 GPa is 1.79 Wm(-1) K-1 and the highest Seebeck coefficient of sample In0.5SnxCo4Sb12 synthesized at 2.8 GPa reached 222 mu V K-1 finally.

• 出版日期2017-11
• 单位吉林大学; 长春理工大学