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	Effect of oxygen sintering atmosphere on the electrical behavior of CCTO ceramics
	Yu, Rong ; Xue, Hao ; Cao, Zeliang ; Chen, La ; Xiong, Zhaoxian ; Xiong ZX(熊兆贤)
	2012-06
关键词	CaCu3Ti4O12 ceramics Pure O-2 atmosphere Electrical behavior'
英文摘要	The CaCu3Ti4O12 ceramics were sintered in air and pure O-2 atmosphere, respectively, and the effect of pure O-2 atmosphere on the electrical behavior of the CaCu3Ti4O12 ceramics was investigated. It was found that the dielectric properties of the CaCu3Ti4O12 ceramics displayed a Debye-like relaxation between 20 Hz and 1 MHz, but the permittivity of the sample sintered in pure O-2 atmosphere was decreased drastically. Moreover, the I-V behavior of the ceramic sintered in pure O-2 atmosphere presented a linear feature. With XPS analysis, it was illustrated that the valence of Cu and Ti elements in the CaCu3Ti4O12 ceramics had obviously been influenced by the O-2 concentration. Based on the experimental comparison of CaCu3Ti4O12 ceiamics sintered in air and pure O-2 atmosphere, it was suggested that the valence of metallic elements and defects played key role for the origin of the giant permittivity and I-V nonlinear feature in the CaCu3Ti4O12 ceramics. (C) 2011 Elsevier Ltd. All rights reserved.; Fundamental Research Funds for the Central Universities [2010121052]; Cooperation Foundation offered by The State Key Laboratory of New Ceramics and Fine Processing in Tsinghua University
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://dx.doi.org/10.1016/j.jeurceramsoc.2011.11.039]
专题	材料学院－已发表论文
推荐引用方式 GB/T 7714	Yu, Rong,Xue, Hao,Cao, Zeliang,et al. Effect of oxygen sintering atmosphere on the electrical behavior of CCTO ceramics[J],2012.
APA	Yu, Rong,Xue, Hao,Cao, Zeliang,Chen, La,Xiong, Zhaoxian,&熊兆贤.(2012).Effect of oxygen sintering atmosphere on the electrical behavior of CCTO ceramics..
MLA	Yu, Rong,et al."Effect of oxygen sintering atmosphere on the electrical behavior of CCTO ceramics".(2012).

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