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	Dramatic effect of multiwalled carbon nanotubes on the electrical properties of alumina based ceramic nanocomposites
	Ahmad, Kaleem ; Pan, Wei
	2010-10-12 ; 2010-10-12
关键词	Carbon nanotubes Nanocomposites Electrical properties Transport properties RANGE-HOPPING CONDUCTION AC CONDUCTIVITY POLYVINYLCHLORIDE COMPOSITES PERCOLATION-THRESHOLD DISORDERED SOLIDS TRANSPORT FILMS DC Materials Science, Composites
中文摘要	We report recent work on electrical properties of multiwalled carbon nanotubes (MWNTs)/alumina composites. The composites with different contents of MWNTs were consolidated by spark plasma sintering and their temperature dependence dc conductivity was scrutinized in the temperature range from 5 to 300 K. The analysis of the temperature dependence of the conductivity suggests that for temperatures higher than 50 K, conduction can be ascribed to thermal fluctuation induced tunneling of the charge carriers through insulating barriers between MWNTs, while at temperatures below 50 K, the conduction can be attributed to three dimensional variable range hopping through MWNTs network in the alumina matrix. The frequency dependence of the conductivity was studied from 5 to 1.3 x 10(7) Hz. The universality of the ac conduction in MWNT/alumina composites was examined by construction of master curve. (C) 2009 Elsevier Ltd. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCI LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/78373]
专题	清华大学
推荐引用方式 GB/T 7714	Ahmad, Kaleem,Pan, Wei. Dramatic effect of multiwalled carbon nanotubes on the electrical properties of alumina based ceramic nanocomposites[J],2010, 2010.
APA	Ahmad, Kaleem,&Pan, Wei.(2010).Dramatic effect of multiwalled carbon nanotubes on the electrical properties of alumina based ceramic nanocomposites..
MLA	Ahmad, Kaleem,et al."Dramatic effect of multiwalled carbon nanotubes on the electrical properties of alumina based ceramic nanocomposites".(2010).

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