High temperature thermoelectric properties of BaxYbyFe3CoSb12 p-type skutterudites

被引：6

作者：

Dong, Yongkwan ^{[1
]}

Nolas, George S. ^{[1
]}

Zeng, Xiaoyu ^{[2
]}

Tritt, Terry M. ^{[2
]}

机构：

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

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

来源：

JOURNAL OF MATERIALS RESEARCH | 2015年 / 30卷 / 17期

基金：

美国国家科学基金会;

关键词：

FILLED SKUTTERUDITES; MERIT; FIGURE;

D O I：

10.1557/jmr.2015.156

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Double-filled high Fe content skutterudites, BaxYbyFe3CoSb12 (x + y = 1), were synthesized to investigate their high temperature transport properties. Both their phase and stoichiometry were characterized by powder x-ray diffraction and energy dispersive spectroscopy. The Seebeck coefficient, S, and electrical resistivity, q, increase with increasing temperature for all specimens over the entire measured temperature range. The thermal conductivity for the two low Ba content specimens decreases with increasing temperature up to 550 K at which point it increases with temperature due to bipolar diffusion. Bipolar diffusion becomes negligible with increasing Ba content. Due to this low bipolar diffusion, the ZT values of the higher Ba content specimens increase linearly with temperature, with the highest ZT value obtained for Ba0.9Yb0.1Fe3CoSb12.

引用

页码：2558 / 2563

页数：6

共 37 条

[1]

Berman R., 1976, Thermal Conductivity in Solids

[2] Thermoelectric properties of p-type skutterudites YbxFe3.5Ni0.5Sb12 (0.8 ≤ x ≤ 1) [J].