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	Bi2Te3 and Bi2Te3/nano-SiC prepared by mechanical alloying and spark plasma sintering
	Liu, J ; Li, JF
	2010-05-10 ; 2010-05-10
会议名称	HIGH-PERFORMANCE CERAMICS III, PTS 1 AND 2 ; 3rd China International Conference on High-Performance Ceramics (CICC-3) ; Shenzhen, PEOPLES R CHINA ; Web of Science
关键词	mechanical alloying Spark Plasma Sinter bismuth telluride Materials Science, Ceramics Materials Science, Composites
中文摘要	Bi2Te3-based alloys are currently best-known, technological thermoelectric materials near room temperature. In this paper, Bi2Te3 and nano-SiC dispersed Bi2Te3 were prepared by mechanical alloying followed by spark plasma sintering (SPS). Raw powders of Bi, Te and SiC were mixed and mechanically alloyed in an argon atmosphere using a planetary ball mill. The SPS temperature was 623K, and the holding time was 5 minutes. The samples were characterized by X-ray Diffraction (XRD) and Scanning electron Microscope (SEM). The thermoelectric properties: i.e. Seebeck coefficient, electrical resistivity and thermal conductivity were measured at temperatures from room temperature to 573K, followed by the evaluation of figure of merit. The results revealed that the SiC dispersion in the Bi2Te3 matrix increased Seebeck coefficient. Although the electrical resistivity was increased somewhat, the thermal conductivity was reduced by the SiC dispersion, indicating that promising thermoelectric materials with enhanced mechanical properties may be obtained in the nano-SiC dispersed Bi2Te3 composites with optimal compositions.
会议录出版者	TRANS TECH PUBLICATIONS LTD ; ZURICH-UETIKON ; BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/18515]
专题	清华大学
推荐引用方式 GB/T 7714	Liu, J,Li, JF. Bi2Te3 and Bi2Te3/nano-SiC prepared by mechanical alloying and spark plasma sintering[C]. 见:HIGH-PERFORMANCE CERAMICS III, PTS 1 AND 2, 3rd China International Conference on High-Performance Ceramics (CICC-3), Shenzhen, PEOPLES R CHINA, Web of Science.

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