Crystal structure and high temperature transport properties of Yb-filled p-type skutterudites YbxCo2.5Fe1.5Sb12

被引：17

作者：

Dong, Yongkwan ^{[1
]}

Puneet, Pooja ^{[2
]}

Tritt, Terry M. ^{[2
]}

Nolas, George S. ^{[1
]}

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[2] Clemson Univ, Dept Phys & Astron, Kinard Lab, Clemson, SC 29634 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2014年 / 209卷

基金：

美国国家科学基金会;

关键词：

Skutterudites; Thermoelectrics; Solid state reactions; LATTICE THERMAL-CONDUCTIVITY; THERMOELECTRIC PROPERTIES; BAYFEXCO4-XSB12; OPTIMIZATION; FIGURE; MERIT;

D O I：

10.1016/j.jssc.2013.10.009

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Partially Yb-filled Fe substituted polycrystalline p-type skutterudites with nominal compositions YbxCo2.5Fe1.5Sb12, with varying filler concentrations x, were synthesized by reacting the constituent elements and subsequent solid state annealing, followed by densification by hot-pressing. The compositions and filling fractions were confirmed with a combination of Rietveld refinement and elemental analysis. Their thermoelectric properties were evaluated from 300 to 800 K. The Seebeck coefficients for the specimens increase with increasing temperature and plateau at around 750 K. The thermal conductivity decreases with increasing Yb filling fraction, and bipolar conduction becomes evident and increases at elevated temperatures. A maximum ZT value of 0.8 was obtained at 750 K for Yb0.47Co2.6Fe1.4Sb12. The thermoelectric properties and potential for further optimization are discussed in light of our results. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：1 / 5

页数：5

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