添加La的Bi_2Te_3和Bi_(0.5)Sb_(1.5)Te_3热电材料的电磁感应熔炼法制备及其热电性能  

Synthesis of La-Doped Bi_2Te_3 and Bi_(0.5)Sb_(1.5)Te_3 via the Electromagnetic Induction Method and Their Thermoelectric Properties

作　　者：傅继澎[1] 杨秀云[1] 张姗姗[1] 高莹[1] 高秀霞[1] 李云辉[1] 

机构地区：[1]长春理工大学化学与环境工程学院,长春130022

出　　处：《应用化学》2012年第9期1096-1098,共3页Chinese Journal of Applied Chemistry

基　　金：吉林省教育厅基金(200743)资助项目

摘　　要：在N2气保护下,采用电磁感应法制备了添加La的Bi2Te3和Bi0.5Sb1.5Te3。运用X射线粉末衍射、电感耦合等离子光谱和扫描电子显微镜对材料的物相成分和形貌进行了表征。研究了La对Bi2Te3和Bi0.5Sb1.5Te3热电材料的电导率(σ)、Seebeck系数(S)和热导率(κ)的影响。实验结果表明,添加La明显降低了2种材料的热导率,提高了热电优值(ZT),添加La的Bi0.5Sb1.5Te3的热电优值在室温超过了1。Under the protection of pure N2, La-doped Bi2Te3 and Bi0.5Sb1.5Te3 were prepared by the method of electromagnetic induction. The structures and morphologies of the samples were characterized using X-ray diffraction, inductively coupled plasma and scanning electron microscopy. The electricity conductivity（σ）, Seebeck coefficient（S） and thermal conductivity（κ） were studied. The results showed that La-doped samples have lower thermal conductivity and enhanced figure of merit（ZT）. The thermoelectric figure of merit of La-doped Bi0.5Sb1.5Te3 were improved up to 1 at room temperature.

关 键 词：热电材料 稀土La 电磁感应 

分 类 号：O613.5[理学—无机化学]