Colossal permittivity of (Li, Nb) co-doped TiO2 ceramics

doi:10.1016/j.ceramint.2019.03.080

SIC OpenIR

	Colossal permittivity of (Li, Nb) co-doped TiO2 ceramics
	Li, Wenlong; Liu, Zhifu; Zhang, Faqiang; Sun, Qingbo; Liu, Yun; Li, Yongxiang
	2019-06-15
Source Publication	CERAMICS INTERNATIONAL
ISSN	0272-8842
Volume	45 Issue:9 Pages:11920
Subtype	Article
Abstract	In this work, (Li, Nb) co-doped TiO2 ceramics (LNTOx, x < 0.1), were synthesized through a conventional solid state reaction method. As revealed by X-ray diffraction (XRD) spectra, all LNTO ceramics exhibited pure tetragonal rutile structure. The LNTO0.01 ceramic showed a colossal permittivity over 7000 and a low dielectric loss (tg delta < 0.06) in a wide frequency range of 10(2) Hz-10(7) Hz. The dielectric spectra under DC biases were tested at different temperatures. The experimental data could fit the modified Debye equation well. It was found that there are multiple dielectric polarization mechanisms in LNTO ceramics including space charge polarization, relaxor-type relaxation, polaron hopping and dipole polarization related with localized electrons.
Keyword	Colossal permittivity Co-doped TiO2 ceramic Modified Debye equation Multiple polarization
DOI	10.1016/j.ceramint.2019.03.080
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:12[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27048
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Li, Wenlong,Liu, Zhifu,Zhang, Faqiang,et al. Colossal permittivity of (Li, Nb) co-doped TiO2 ceramics[J]. CERAMICS INTERNATIONAL,2019,45(9):11920.
APA	Li, Wenlong,Liu, Zhifu,Zhang, Faqiang,Sun, Qingbo,Liu, Yun,&Li, Yongxiang.(2019).Colossal permittivity of (Li, Nb) co-doped TiO2 ceramics.CERAMICS INTERNATIONAL,45(9),11920.
MLA	Li, Wenlong,et al."Colossal permittivity of (Li, Nb) co-doped TiO2 ceramics".CERAMICS INTERNATIONAL 45.9(2019):11920.

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