Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics

	Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics
	Li, T; Chen, J; Liu, DW; Zhang, ZX; Chen, ZP; Li, ZX; Cao, XZ; Wang, BY;李卓昕; Cao XZ(曹兴忠); Wang BY(王宝义)
刊名	CERAMICS INTERNATIONAL
	2014
卷号	40 期号:7A 页码:9061-9067
关键词	Dielectric properties CaCu3Ti4O12-xNiO ceramics Microstructure Positron lifetimes
英文摘要	The influence of NiO-doping on the microstructure and dielectric properties of CaCu3Ti4O12-xNiO (x=0, 0.003, 0.006, 0.010, 0.015, and 0.020) ceramics has been investigated using SEM, Raman spectra and dielectric spectrum measurements. The positron annihilation lifetime spectra (PALS) are used to investigate the influence of defects on the dielectric properties. The SEM results show that the grain morphology varies significantly with increasing NiO content. An appropriate small amount of NiO can promote the grain growth, which is beneficial to improve the dielectric properties in a CaCu3Ti4O12 (CCTO) system. Positron results show that there are vacancy-type defects in the experimental samples, and the concentration of the defect and the defect type both change with increasing NiO content. The effects of microstructure including the grain morphology and the vacancy defects on the mechanism of the dielectric properties by adding NiO are discussed. The results demonstrate the importance of the grain morphology and the characteristic of defects in controlling the electrical properties of CCTO ceramics. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
学科主题	Materials Science
收录类别	SCI
WOS记录号	WOS:000337015200016
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224873]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, T,Chen, J,Liu, DW,et al. Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics[J]. CERAMICS INTERNATIONAL,2014,40(7A):9061-9067.
APA	Li, T.,Chen, J.,Liu, DW.,Zhang, ZX.,Chen, ZP.,...&王宝义.(2014).Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics.CERAMICS INTERNATIONAL,40(7A),9061-9067.
MLA	Li, T,et al."Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics".CERAMICS INTERNATIONAL 40.7A(2014):9061-9067.