Preparation of nano-sized Bi2Te3 thermoelectric material powders by cryogenic grinding

被引：36

作者：

Chen, Xiaozong ^{[1
]}

Liu, Leifeng ^{[2
]}

Dong, Yuan ^{[1
]}

Wang, Lianjun ^{[1
]}

Chen, Lidong ^{[3
]}

Jiang, Wan ^{[1
]}

机构：

[1] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

[2] Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden

[3] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2012年 / 22卷 / 03期

关键词：

Thermoelectric (TE) material; Cryogenic grinding; Bi2Te3; Nanoparticles; Two-step breaking model; QUANTUM-WELL STRUCTURES; FIGURE-OF-MERIT; PERFORMANCE; ALLOYS;

D O I：

10.1016/j.pnsc.2012.04.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel method for rapid preparation of Bi2Te3 nano-sized powders with an average particle size of about 7nm was developed. A starting powder mixture consisting of Bi2Te3 coarse particles of similar to 5mm was ground using cryogenic grinding in the liquid nitrogen. For comparison, the conventional high-energy ball milling was used to prepare the Bi2Te3 nano-sized powders. Sintering properties of as-prepared powders was investigated by spark plasma sintering (SPS). The effects of the preparation procedure on the crystallinity, morphology and structure were examined by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found that Bi2Te3 was not transformed into a non-equilibrium amorphous phase or decomposed during the cryogenic grinding process, and as-prepared nano-powders possessed excellent sinterability. This technique might also be applicable to other thermoelectric materials.

引用

页码：201 / 206

页数：6

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