Preparation and thermoelectric properties of polycrystalline nonstoichiometric Yb14MnSb11 Zintl compounds

Preparation and thermoelectric properties of polycrystalline nonstoichiometric Yb14MnSb11 Zintl compounds
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多晶非化学计量Yb14MnSb11 Zintl化合物的制备及其热电性能

DOI:
10.1002/pssr.201004193
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发表时间:
2010-09
期刊:
Physica Status Solidi - Rapid Research Letters
影响因子:
--
通讯作者:
Zhao, X. B.
Zhao, X. B.
中科院分区:
其他
文献类型:
--
作者:
Yu, C.;Zhu, T. J.;Yang, S. H.;Shen, J. J.;Zhao, X. B.

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采用改进的感应熔炼和放电等离子烧结方法成功地制备了多晶非化学计量比Yb 14 MnSb 11化合物。通过改变Mn与Sb的元素比来微调载流子浓度。过量的Mn降低电导率并增加塞贝克系数。所有样品的热导率小于1.0 W m-1 K-1。Yb14Mn1.05Sb11在673 K时的最大ZT值为0.35 K,明显高于化学计量比的Yb 14 MnSb 11多晶样品。(© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA,魏因海姆)
Polycrystalline nonstoichiometric Yb14MnSb11 compounds have been successfully prepared by modified induction melting and spark plasma sintering. The carrier concentration was finely tuned by changing the elemental ratio of Mn to Sb. Excess Mn decreases the electrical conductivity and increases the Seebeck coefficient. The thermal conductivity of all samples was less than 1.0 W m–1 K–1. The maximum ZT value is 0.35 K at 673 K for Yb14Mn1.05Sb11, significantly higher than that of the stoichiometric Yb14MnSb11 polycrystalline sample. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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