Characterizations of solid-state microwave-synthesized Sb2Te3-based alloys with various compositions of bismuth in Bi2xSb2(1-x)Te3

被引：19

作者：

Kadhim, A. ^{[1
]}

Hmood, A. ^{[1
]}

Abu Hassan, H. ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Phys, Nanooptoelect Res & Technol Lab NOR, Pulau Penang 11800, Malaysia

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2012年 / 15卷 / 05期

关键词：

Microwave irradiation; Chalcogenides; Electrical properties; Crystal structure; THERMOELECTRIC PROPERTIES; THIN-FILMS; MICROSTRUCTURE; IRRADIATION; DIFFUSION; CRYSTALS; CATALYST; BI2TE3;

D O I：

10.1016/j.mssp.2012.04.006

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this article, thermoelectric (TE) materials based on p-type Sb2Te3 samples and dispersed with x amounts of Bi (x=0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) in the form Bi2Sb2(1-x)Te3 were synthesized via a standard solid-state microwave route. The microstructure of the ingots was characterized by field emission scanning electron microscopy. As-synthesized ingots were formed by the assembly of micro-sheet grains. The phase composition of the powders was characterized by X-ray diffraction, revealing a rhombohedral structure. The influence of variations in Bi content (x) on the TE properties of the resulting alloy was studied in the temperature range of 303 K to 523 K. Increases in x caused a decrease in hole concentration and electrical conductivity and an increase in Seebeck coefficient. A maximum power factor of 4.96 mW/mK(2) was obtained at about 373 K for a Bi2xSb2(1-x)Te3 sample with x=0.2. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：549 / 554

页数：6

共 27 条

[21] Thermoelectric and thermomechanical properties of the hot pressed polycrystalline Bi0.5S1.5Te3 alloys [J].

Shen, J. J. ;

Zhang, S. N. ;

Yang, S. H. ;

Yin, Z. Z. ;

Zhu, T. J. ;

Zhao, X. B. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (01) :161-164

[22] Complex thermoelectric materials [J].

Snyder, G. Jeffrey ;

Toberer, Eric S. .

NATURE MATERIALS, 2008, 7 (02) :105-114

[23] Influence of Se on the electron mobility in thermal evaporated Bi2(Te1-xSex)3 thin films [J].

Soliman, L. I. ;

Nassary, M. M. ;

Shaban, H. T. ;

Salwa, A. S. .

VACUUM, 2010, 85 (03) :358-364

[24] Enhanced performances of melt spun Bi2(Te,Se)3 for n-type thermoelectric legs [J].

Wang, Shanyu ;

Xie, Wenjie ;

Li, Han ;

Tang, Xinfeng .

INTERMETALLICS, 2011, 19 (07) :1024-1031

[25] Diffusion in microwave-heated ceramics [J].

Whittaker, AG .

CHEMISTRY OF MATERIALS, 2005, 17 (13) :3426-3432

[26] Thermoelectric properties of p-type (Bi2Te3)x(Sb2Te3)1-x prepared via bulk mechanical alloying and hot pressing [J].

Yang, J ;

Aizawa, T ;

Yamamoto, A ;

Ohta, T .

JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 309 (1-2) :225-228

[27] Processing and characterization of single-crystalline ultrafine bismuth nanowires [J].

Zhang, ZB ;

Gekhtman, D ;

Dresselhaus, MS ;

Ying, JY .

CHEMISTRY OF MATERIALS, 1999, 11 (07) :1659-1665

← 1 2 3 →