SIC OpenIR
Colossal permittivity and dielectric relaxations of (Nb, Al) co-doped BaTiO3ceramics
Huang, Dong1,2; Wu, Ying1; Miao, Ji-Yuan1; Liu, Zhi-Fu1; Li, Yong-Xiang1
2017
Source PublicationWuji Cailiao Xuebao/Journal of Inorganic Materials
ISSN1000324X
Volume32Issue:2Pages:219-224
AbstractNb and Al co-doped BaTiO3ceramics, BaTi0.98(Nb0.5Al0.5)0.02O3, have a colossal permittivity (Εr≈3×105, tanδ≈0.2) at room-temperature. Three distinct relaxation processes are observed in the frequency range from 10-1to 107Hz. The low-frequency relaxation between 10-1and 10 Hz and the intermediate-frequency relaxation between 103and 105Hz are non-Debye relaxations, which are attributed to Maxwell-Wagner interfacial polarization, electrode interfacial polarization, and barrier layer capacitor. While the high-frequency process between 105and 107Hz is a typical Debye-type relaxation with an activation energy of E≈15 meV and a frequency factor of f0≈7×106Hz. The small activation energy and relatively small frequency factor in the BaTi0.98(Nb0.5Al0.5)0.02O3ceramics indicate that this relaxation process may derive from local motion of electrons in the complex defect clusters, which results from co-doping and can be named as electron-pinned defect-dipoles. This study suggests that the electron-pinned defect-dipoles mechanism can be used to design colossal permittivity in perovskites, like BaTiO3. © 2017, Science Press. All right reserved.
DOI10.15541/jim20160280
EI Accession Number20171103436696
EI KeywordsActivation energy
EI Classification Number482.2 Minerals - 812.1 Ceramics - 931.1 Mechanics - 951 Materials Science
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25391
Collection中国科学院上海硅酸盐研究所
Affiliation1.CAS Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.School of Physical Science and Technology, Shanghai Tech University, Shanghai; 201210, China
Recommended Citation
GB/T 7714
Huang, Dong,Wu, Ying,Miao, Ji-Yuan,et al. Colossal permittivity and dielectric relaxations of (Nb, Al) co-doped BaTiO3ceramics[J]. Wuji Cailiao Xuebao/Journal of Inorganic Materials,2017,32(2):219-224.
APA Huang, Dong,Wu, Ying,Miao, Ji-Yuan,Liu, Zhi-Fu,&Li, Yong-Xiang.(2017).Colossal permittivity and dielectric relaxations of (Nb, Al) co-doped BaTiO3ceramics.Wuji Cailiao Xuebao/Journal of Inorganic Materials,32(2),219-224.
MLA Huang, Dong,et al."Colossal permittivity and dielectric relaxations of (Nb, Al) co-doped BaTiO3ceramics".Wuji Cailiao Xuebao/Journal of Inorganic Materials 32.2(2017):219-224.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Huang, Dong]'s Articles
[Wu, Ying]'s Articles
[Miao, Ji-Yuan]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, Dong]'s Articles
[Wu, Ying]'s Articles
[Miao, Ji-Yuan]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, Dong]'s Articles
[Wu, Ying]'s Articles
[Miao, Ji-Yuan]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.