Thermoelectric properties of nonstoichiometric PbTe prepared by HPHT

Thermoelectric properties of nonstoichiometric PbTe prepared by HPHT
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HPHT制备非化学计量PbTe的热电性能

DOI:
10.1016/j.jallcom.2008.01.012
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发表时间:
2009-01
影响因子:
6.2
通讯作者:
Zhu, Tiejun
Zhu, Tiejun
中科院分区:
材料科学2区
文献类型:
--
作者:
Guo, Jianggang;Ma, Hongan;Su, Taichao;Jiang, Yiping;Wei, Cui;Dong, Nan;Zhao, Xinbing;Deng, Le;Jia, Xiaopeng;Zhu, Tiejun

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虽然有报道称,通过高压调谐,pbte基化合物的热电性能得到了巨大的改善,但这种高热电性能不能保持在环境压力下。本文采用高压高温(HPHT)法制备了过量Pb (Pb0.55Te0.45)的非化学计量PbTe样品,并研究了其温度依赖性热电性能。随着温度的升高,样品的塞贝克系数绝对值增大,而电导率和导热系数减小。在690K时,这种TE材料的最大性能值ZT达到了0.37。
Although there has report on PbTe-based compounds with colossal improved thermoelectric (TE) performance by high pressure tuning, the high TE performance could not be kept to ambient pressure. In this report, nonstoichiometric PbTe sample with excess Pb (Pb0.55Te0.45) was prepared by high pressure and high temperature (HPHT) method and the temperature-dependent thermoelectric properties were studied. The absolute value of the Seebeck coefficient for the sample increases while the electrical conductivity and the thermal conductivity decrease with rising temperature. The maximum figure of merit, ZT, of 0.37 has been achieved at 690K for this TE material.
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