Microstructure and composition engineering Yb single-filled CoSb_(3) for high thermoelectric and mechanical performances  

作　　者：Zhenxing Zhou Matthias T.Agne Qihao Zhang Shun Wan Qingfeng Song Qing Xu Xiaofang Lu Shijia Gu Yuchi Fan Wan Jiang Gerald Jeffrey Snyder Lianjun Wang 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai,201620,China [2]Department of Materials Science and Engineering,Northwestern University,Evanston,IL,60208,USA [3]State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,200050,China [4]Center for High Pressure Science and Technology Advanced Research(HPSTAR),Shanghai,201203,China [5]University of Chinese Academy of Sciences,19 Yuquan Road,Beijing,100049,China [6]Institute of Functional Materials,Donghua University,Shanghai,201620,China [7]School of Material Science and Engineering,Jingdezhen Ceramic Institute,Jindezhen,333000,China

出　　处：《Journal of Materiomics》2019年第4期702-710,共9页无机材料学学报（英文）

基　　金：funded by Natural Science Foundation of China(Nos.51774096,51871053);Shanghai Committee of Science and Technology(Nos.16JC1401800,18JC1411200);supported by the NASA Science Missions Directorate under the Radioisotope Power Systems Program;support from the National Science Foundation(DMREF-1333335 and DMREF-1729487).

摘　　要：A broad tunability of the thermoelectric and mechanical properties of CoSb_(3) has been demonstrated by adjusting the composition with the addition of an increasing number of elements.However,such a strategy may negatively impact processing repeatability and composition control.In this work,singleelement-filled skutterudite is engineered to have high thermoelectric and mechanical performances.Increased Yb filling fraction is found to increase phonon scattering,whereas cryogenic grinding contributes additional microstructural scattering.A peak zT of 1.55 and an average zT of about 1.09,which is comparable to the reported results of multiple-filled SKDs,are realized by the combination of simple composition and microstructure engineering.Furthermore,the mechanical properties of Yb single-filled CoSb_(3) skutterudite are improved by manipulation of the microstructure through cryogenic grinding.These findings highlight the realistic prospect of producing high-performance thermoelectric materials with reduced compositional complexity.

关 键 词：SKUTTERUDITES Thermoelectric material Compositional complexity Microstructure engineering Cryogenic grinding 

分 类 号：TG1[金属学及工艺—金属学]