高温高压下Bi2Te3掺杂PbTe的热电性能  

Study of the thermoelectric properties of PbTe doped with Bi_2Te_3 at high-pressure and high-temperature

作　　者：宿太超[1] 马红安[1] 朱品文[1] 周林[1] 郭建刚[1] 贾晓鹏[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室,长春130012

出　　处：《吉林大学学报（工学版）》2008年第1期66-69,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50572032)

摘　　要：利用高温高压技术,在3 GPa1、200 K的条件下,对PbTe进行了Bi2Te3的掺杂,并在室温下对其进行了电阻率、赛贝克系数、热导率的测试。结果表明,高温高压下,掺杂微量的Bi2Te3对PbTe的热电性质有很大的影响,PbTe样品的品质因子随着掺杂Bi2Te3的剂量的增加先大幅度升高而后逐渐轻微下降,掺杂Bi2Te3的摩尔分数为1×10-4时其最大的品质因子高达9.3×10-4K-1。这一结果比常压下利用Bi2Te3对PbTe掺杂的样品高近20%。N-type lead telluride compounds （PbTe） doped with Bi2Te3 were prepared under 3 GPa and 1200 K by HPHT technology. The electrical resistivity, Seebeck coefficient and thermal conductivity of PbTe doped with Bi2Te3 were studied at room temperature. Results show that the figure-of-merit, Z, increases dramatically first, then decreases slowly with the increase in Bi2Te3, and the maximum value of Z is 9.3×10^-4 K^-1 when mole fraction of PbTe is 1×10^-4. This value is about 20% higher than that prepared at ambient pressure.

关 键 词：高能物理学 掺杂 热电材料 高温高压 PBTE BI2TE3 

分 类 号：O521[理学—高压高温物理]