Improved Thermoelectric Properties of p-Type Bismuth Antimony-Based Alloys Prepared by Spark Plasma Sintering
Improved Thermoelectric Properties of p-Type Bismuth Antimony-Based Alloys Prepared by Spark Plasma Sintering
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DOI：
10.1007/s11664-014-3055-z
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发表时间：
2014-02
影响因子：
2.1
通讯作者：
Zongqi Chen;Yemao Han;Molin Zhou;C. Song;Renzhong Huang;Yuwei Zhou;L. Li
中科院分区：
文献类型：
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作者：
Zongqi Chen;Yemao Han;Molin Zhou;C. Song;Renzhong Huang;Yuwei Zhou;L. Li
采用机械合金化-放电等离子烧结（MA-SPS）方法制备了Bi 85 Sb 15 −xPbx（x= 0，0.5，1，2，3）合金。采用X射线衍射和扫描电镜对合金的微观结构进行了表征。在77-300 K温度范围内研究了Pb含量对热电性能的影响。结果表明，Pb取代Sb后，Bi-Sb合金的电输运性质由n型转变为top型。最大功率因数在190 K时达到1.6 × 10− 3 W/mK2，比其他地方报道的数值有显著提高。本研究表明，放电等离子烧结可以获得高性能的热电型Bi-Sb材料。
Bi85Sb15−xPbx(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 fromn-type top-type with substitution of Sb by Pb. The maximum power factor reached 1.6 × 10−3W/mK2at 190 K, a significant improvement on values reported elsewhere. This study demonstrated that high-performancep-type thermoelectric Bi–Sb materials can be obtained by spark plasma sintering.