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	Enhanced thermoelectric properties of bismuth sulfide polycrystals prepared by mechanical alloying and spark plasma sintering
	Zhao, Li-Dong ; Zhang, Bo-Ping ; Liu, Wei-Shu ; Zhang, Hai-Long ; Li, Jing-Feng
	2010-05-10 ; 2010-05-10
关键词	Bismuth sulfides Mechanical alloying Spark plasma sintering Thermoelectric BI2S3 CRYSTALS Chemistry, Inorganic & Nuclear Chemistry, Physical
中文摘要	Bismuth sulfide powders were synthesized by mechanical alloying (MA) and then consolidated by spark plasma sintering (SPS) technique. In order to improve the electrical transport properties of bismuth sulfides, the carrier concentration was optimized by modifying chemical composition of sulfur through producing Sulfur vacancies, and the carrier mobility was enhanced by a two-step SPS as a hot-forging process through increasing grain orientation. The electrical resistivity of bismuth sulfides was reduced to 10(-4) from 10(-2) Omega m by optimizing sulfur content, and further lowered by hot-forging, whereby the power factor Was significantly increased from 91 to 254 mu W/mK(2). The hot-forged Bi2S2.90 sample showed the highest ZT = 0.11 (at 523 K), which is higher than the reported value. The present Work revealed that bismuth sulfide compounds as a promising candidate of thermoelectric materials can be synthesized by a simple process. (C) 2008 Published by Elsevier Inc.
语种	英语 ; 英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE ; SAN DIEGO ; 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/20714]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao, Li-Dong,Zhang, Bo-Ping,Liu, Wei-Shu,et al. Enhanced thermoelectric properties of bismuth sulfide polycrystals prepared by mechanical alloying and spark plasma sintering[J],2010, 2010.
APA	Zhao, Li-Dong,Zhang, Bo-Ping,Liu, Wei-Shu,Zhang, Hai-Long,&Li, Jing-Feng.(2010).Enhanced thermoelectric properties of bismuth sulfide polycrystals prepared by mechanical alloying and spark plasma sintering..
MLA	Zhao, Li-Dong,et al."Enhanced thermoelectric properties of bismuth sulfide polycrystals prepared by mechanical alloying and spark plasma sintering".(2010).

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