Experimental studies on overall property of thermoelectric modules with sandwiched structures  

作　　者：Jianjun Zhu Zhen Li Xing Zhang 

机构地区：[1]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics,Tsinghua University

出　　处：《Chinese Science Bulletin》2014年第5期571-576,共6页

基　　金：supported by the National Natural Science Foundation of China(51138005,51376097);the National Basic Research Program of China(2013CB228300)

摘　　要：Based on direct-current transient Harman method,an integrated characterization system of thermoelectric device’s performance is established.The overall properties of thermoelectric modules with sandwiched structures are experimentally investigated,including Seebeck coefficients,figures of merit(ZT),electrical and thermal conductivities.Experiment results reveal that ZT values of thermoelectric modules are smaller than those of commercial bismuth telluride(Bi2Te3)modules.In contrast,Seebeck coefficients are significantly larger than traditional thermoelectric device’s values.Meanwhile,both electrical and thermal conductivities are greater compared with literature data.Our results have proposed a feasible and economical way that can potentially increase Seebeck coefficients as to bulk Bi2Te3materials without significant deterioration to the nature of Peltier effect.Based on direct-current transient Harman method, an integrated characterization system of thermo- electric device＇s performance is established. The overall properties of thermoelectric modules with sandwiched structures are experimentally investigated, including See- beck coefficients, figures of merit （ZT）, electrical and thermal conductivities. Experiment results reveal that ZT values of thermoelectric modules are smaller than those of commercial bismuth telluride （BizTe3） modules. In con- trast, Seebeck coefficients are significantly larger than traditional thermoelectric device＇s values. Meanwhile, both electrical and thermal conductivities are greater compared with literature data. Our results have proposed a feasible and economical way that can potentially increase Seebeck coefficients as to bulk BiaTe3 materials without significant deterioration to the nature of Peltier effect.

关 键 词：热电器件 模块 性能 结构 塞贝克系数 试验 珀尔帖效应 表征系统 

分 类 号：TN37[电子电信—物理电子学]