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Colossal permittivity behavior and its origin in rutile (Mg1/3Ta2/3)(x)Ti1-xO2
Dong, Wen; Chen, Dehong; Hu, Wanbiao; Frankcombe, Terry J.; Chen, Hua2; Zhou, Chao3; Fu, Zhenxiao3; Wei, Xiaoyong4,5; Xu, Zhuo4,5; Liu, Zhifu6; Li, Yongxiang6; Liu, Yun
2017
发表期刊SCIENTIFIC REPORTS
ISSN2045-2322
卷号7
摘要This work investigates the synthesis, chemical composition, defect structures and associated dielectric properties of (Mg2+, Ta5+) co-doped rutile TiO2 polycrystalline ceramics with nominal compositions of (Mg2+ Ta-1/3(5+) (2/3))(x)Ti1-xO2. Colossal permittivity (> 7000) with a low dielectric loss (e.g. 0.002 at 1 kHz) across a broad frequency/temperature range can be achieved at x = 0.5% after careful optimization of process conditions. Both experimental and theoretical evidence indicates such a colossal permittivity and low dielectric loss intrinsically originate from the intragrain polarization that links to the electronpinned Mg ''(Ti) + V-O(center dot center dot) + 2Ta(Ti)(center dot) + 2Ti '(Ti) defect clusters with a specific configuration, different from the defect cluster form previously reported in tri-/pent-valent ion co-doped rutile TiO2. This work extends the research on colossal permittivity and defect formation to bi-/penta-valent ion co-doped rutile TiO2 and elucidates a likely defect cluster model for this system. We therefore believe these results will benefit further development of colossal permittivity materials and advance the understanding of defect chemistry in solids.
DOI10.1038/s41598-017-08992-x
WOS记录号WOS:000408622400044
引用统计
文献类型期刊论文
条目标识符http://ir.sic.ac.cn/handle/331005/26651
专题中国科学院上海硅酸盐研究所
作者单位1.Australian Natl Univ, Res Sch Chem, Canberra, ACT 2601, Australia
2.Frankcombe, Terry J.] Univ New South Wales, Sch Phys Environm & Math Sci, Canberra, ACT 2601, Australia
3.Australian Natl Univ, Ctr Adv Microscopy, Canberra, ACT 2601, Australia
4.Fenghua Adv Technol Holding Co Ltd, Zhaoqing 526020, Guangdong, Peoples R China
5.Xi An Jiao Tong Univ, Minist Educ, Elect Mat Res Lab, Key Lab, Xian 710049, Shaanxi, Peoples R China
6.Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China
7.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China
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GB/T 7714
Dong, Wen,Chen, Dehong,Hu, Wanbiao,et al. Colossal permittivity behavior and its origin in rutile (Mg1/3Ta2/3)(x)Ti1-xO2[J]. SCIENTIFIC REPORTS,2017,7.
APA Dong, Wen.,Chen, Dehong.,Hu, Wanbiao.,Frankcombe, Terry J..,Chen, Hua.,...&Liu, Yun.(2017).Colossal permittivity behavior and its origin in rutile (Mg1/3Ta2/3)(x)Ti1-xO2.SCIENTIFIC REPORTS,7.
MLA Dong, Wen,et al."Colossal permittivity behavior and its origin in rutile (Mg1/3Ta2/3)(x)Ti1-xO2".SCIENTIFIC REPORTS 7(2017).
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