Enhanced thermoelectric properties of Co_(1-x-y)Ni_(x+y)Sb_(3-x)Sn_x materials

作     者：Hong-quan Liu Sheng-nan Zhang Tie-jun Zhu Xin-bing Zhao Yi-jie Gu Hong-zhi Cui 

作者机构：College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266510 China State Key Laboratory of Silicon Materials Development of Materials Science and Engineering Zhejiang University Hangzhou 310027 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2012年第19卷第3期

页      面：240-244页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.50801054 and 51072104) the Research Award Fund for Outstanding Young Scientists in Shandong Province,China (No.BS2011CL031) 

主　　题：thermoelectric material polycrystals skuttemdites alloying thermoelectric properties clopping 

摘      要：Co1-x-yNix＋ySb3-xSnx polycrystals were fabricated by vacuum melting combined with hot-press sintering. The effect of alloying on the thermoelectric properties of unfilled skutterudite CO1-xNixSb3-xSnx was investigated. A leap of electrical conductivity from the Co0.93Ni0.07Sb2.93Sn0.07 sample to the Co0.88Ni0.12Sb288Sn0.12 sample occurs during the measurement of electrical conductivity, indicating the adjustment of band structure by proper alloying. The results show that alloying enhances the power factor of the materials. On the basis of alloying, the thermoelectric properties of ***.12 are improved by Ni-doping. The thermal conductivities of Ni-doping samples have no reduction, but their power factors have obvious enhancement. The power factor of Co0.81Ni0.09Sb2.88Sn0.12 reaches 3.0 mW-m-1·K-2 by Ni doping. The dimensionless thermoelectric figure of merit reaches 0.55 at 773 K for the unfilled Co0.81Ni0.19 Sb2.88Sn0.12,