Abstract
Bi85Sb15−x Pb x (x = 0, 0.5, 1, 2, 3) alloys have been prepared by the mechanical alloying–spark plasma sintering (MA-SPS) method. X-ray diffraction and scanning electron microscopy were used to characterize the microstructure of the alloys. The effect of Pb content on the thermoelectric properties was investigated in the temperature range 77–300 K. The results showed that the electrical transport properties of the Bi–Sb alloys changed from n-type to p-type with substitution of Sb by Pb. The maximum power factor reached 1.6 × 10−3 W/mK2 at 190 K, a significant improvement on values reported elsewhere. This study demonstrated that high-performance p-type thermoelectric Bi–Sb materials can be obtained by spark plasma sintering.
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The authors acknowledge financial support by the National Natural Science Foundation of China (nos 50802101 and 51066008) and the fund of the State Key Laboratory of Technologies in Space Cryogenic Propellants, SKLTSCP1202.
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Chen, Z., Han, Y.M., Zhou, M. et al. Improved Thermoelectric Properties of p-Type Bismuth Antimony-Based Alloys Prepared by Spark Plasma Sintering. J. Electron. Mater. 43, 1295–1301 (2014). https://doi.org/10.1007/s11664-014-3055-z
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DOI: https://doi.org/10.1007/s11664-014-3055-z