Unique nanostructures and enhanced thermoelectric performance of melt-spun BiSbTe alloys

被引：541

作者：

Xie, Wenjie ^{[1
,2
]}

Tang, Xinfeng ^{[1
]}

Yan, Yonggao ^{[1
]}

Zhang, Qingjie ^{[1
]}

Tritt, Terry M. ^{[2
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

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

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 10期

关键词：

antimony alloys; bismuth alloys; grain boundaries; melt spinning; nanostructured materials; plasma materials processing; sintering; tellurium alloys; thermal conductivity; thermoelectricity; FILLED SKUTTERUDITE ANTIMONIDES; MERIT; FIGURE;

D O I：

10.1063/1.3097026

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a melt spinning technique followed by a quick spark plasma sintering procedure to fabricate high-performance p-type Bi0.52Sb1.48Te3 bulk material with unique microstructures. The microstructures consist of nanocrystalline domains embedded in amorphous matrix and 5-15 nm nanocrystals with coherent grain boundary. The significantly reduced thermal conductivity leads to a state-of-the-art dimensionless figure of merit ZT similar to 1.56 at 300 K, more than 50% improvement of that of the commercial Bi2Te3 ingot materials.

引用

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