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Origin of high dielectric performance in fine grain-sized CaCu3Ti4O12 materials
Lin, H; Xu, WT; Zhang, HT; Chen, C; Zhou, YF; Yi, ZG
2020-05-01
Source PublicationJOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
Issue54Pages:1957
SubtypeArticle
AbstractWe report on high dielectric constant (8.3 x 10(3), 10(4) Hz), low dielectric loss (0.029, 10(4) Hz)as well as fine grain size (similar to 840 nm) achieved in pure CaCu3Ti4O12 (CCTO) ceramics through a combination of sol-gel method, spark plasma sintering and annealing process. By adjusting the sintering temperature and annealing conditions, the composition variations, valence states and microstructures of CCTO ceramics are systematically studied, which provide direct clues in understanding the origin of their excellent dielectric response. Through the studies on the dielectric, impedance, modulus and conductivity properties of CCTO ceramics, a modified brick-layer model based on two interfacial polarizations originating from sub-grain boundary and grain boundary barriers is proposed to explain their dielectric behaviors. The high dielectric constant of CCTO ceramics is mainly dominated by the sub-grain contribution; and the reduced dielectric loss is attributed to the decreases of electrical conductivity and relaxation loss.
DOI10.1016/j.jeurceramsoc.2019.12.042
WOS KeywordCURRENT-VOLTAGE BEHAVIOR ; ELECTRICAL-PROPERTIES ; MICROSTRUCTURE EVOLUTION ; DOPED CACU3TI4O12 ; CERAMICS ; CONSTANT ; PERMITTIVITY ; CONDUCTION ; STABILITY ; OXYGEN
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28105
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lin, H,Xu, WT,Zhang, HT,et al. Origin of high dielectric performance in fine grain-sized CaCu3Ti4O12 materials[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(54):1957.
APA Lin, H,Xu, WT,Zhang, HT,Chen, C,Zhou, YF,&Yi, ZG.(2020).Origin of high dielectric performance in fine grain-sized CaCu3Ti4O12 materials.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(54),1957.
MLA Lin, H,et al."Origin of high dielectric performance in fine grain-sized CaCu3Ti4O12 materials".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .54(2020):1957.
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