1. School of Metallurgy Engineering, Anhui University of Technology, Ma′anshan 243002, Anhui, China 2. College of Materials Science and Engineering, Kunming University of Science and Technology,Kunming 650093, Yunnan, China
Abstract：Te- doped skutterudite Co3Sb3-xTex (x=0, 0. 4, 0. 5) samples were prepared by rapid microwave synthesis and spark plasma sintering (SPS). The phase composition, microstructure, electrical properties, thermal properties were characterized. The XRD patterns showed that the high- purity CoSb3 compounds are synthesized in 4- 5min; The SEM photographs showed that the grain size are about 1- 10μm; the electrical performance analysis showed that the resistivity of doped sample are significant lower than that of no- doped sample. At the temperature of 423- 673K, the resistivity and power factor of Co3Sb2. 5Te0. 5 are 4. 98μΩ·m and 1400- 1800μW·m-1·K-2 respectively. The thermal conductivity and lattice thermal conductivity of Co3Sb2. 5Te0. 5 are 4. 4- 5. 2W·m-1·K-1 and 2. 3- 4. 2W·m-1·K-1 respectively, which also significant lower than that of no- doped CoSb3. The thermoelectric figure of merit increased significantly with the increase of temperature in the room temperature range (283- 773K), and the maximum value reached 0. 29.
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2019, Vol. 26 
