Abstract：Bi0.5Sb1.5Te3/Sn core-shell powders were prepared by electroless plating and hydrogen reduction, and then bulk was prepared by spark plasma sintering. The results show that the Seebeck coefficient and conductivity of Bi0.5Sb1.5Te3/Sn bulk alloy increase firstly and then decrease with the increase of Sn content. The Seebeck coefficient of Bi0.5Sb1.5Te3/Sn bulk alloy with 1 wt.% Sn increases to 278 uV/K, and the conductivity is 475.6S/cm which is slightly lower than that of uncoated samples. Therefore, the power factor increases from 24.6 W·cm-1·K-2 to 35.4 W·cm-1·K-2 at room temperature, which proves that the electrical transport properties of the sample is improved. In addition, with the increase of Sn content, the density and microhardness of Bi0.5Sb1.5Te3/Sn bulk alloy increase continuously, and the mechanical properties are improved.
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2020, Vol. 27 