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| Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity | |
| Qu, Yunpeng1; Du, Yu2,3; Fan, Guohua1; Xin, Jiahao4; Liu, Yao1; Xie, Peitao1; You, Shuxin1; Zhang, Zidong1; Sun, Kai4; Fan, Runhua4 | |
| 2019-01-15 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 771Pages:699-710 |
| Abstract | Since negative permittivity demonstrated in metamaterials, how to effectively tune negative permittivity still the challenge to satisfy practical applications. Meta-composites could provide alternative routes to tunable negative permittivity. In this paper, Graphene/CaCu3Ti4O12 (GR/CCTO) meta-composites with different GR content were fabricated by low-temperature pressureless sintering. Microstructures and compositions of GR/CCTO were investigated in detail. The electrical and dielectric properties of GR/CCTO nanocomposites were investigated at 10 kHz - 1 MHz and 20 MHz - 1 GHz region respectively. AC conductivity spectra showed different variation trends which were explained by Jonscher's power law or Drude model, indicating conductive mechanism transformation from hopping conduction to metal-like conduction. Lorentz-type and/or Drude-type negative permittivity behaviors were observed at radio-frequency region. Tunable negative permittivity were realized by changing GR content in GR/CCTO nanocomposites. Correspondence between inductive characteristic and negative permittivity was manifested by equivalent circuit analysis of impedance response of GR/CCTO composites. This work not only presents novel routes to tune negative permittivity, but also further clarifies negative permittivity generation mechanism, which will greatly facilitate applications in impedance matching, electromagnetic shielding and multi-layer high-k capacitors etc. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Negative permittivity Meta-composites Graphene Metamaterials CaCu3Ti4O12 |
| DOI | 10.1016/j.jallcom.2018.09.049 |
| Language | 英语 |
| WOS Keyword | LOW DIELECTRIC LOSS ; GRAPHENE OXIDE ; MECHANICAL-PROPERTIES ; CACU3TI4O12 CERAMICS ; INDEX METAMATERIALS ; POLY(VINYL ALCOHOL) ; REFRACTIVE-INDEX ; RADIO-FREQUENCY ; COMPOSITES ; BEHAVIOR |
| Funding Project | National Natural Science Foundation of China[51771104] ; National Natural Science Foundation of China[51402170] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Funding Organization | National Natural Science Foundation of China |
| WOS ID | WOS:000449621500089 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/26637 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Liu, Yao; Zhang, Zidong |
| Affiliation | 1.Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Shanghai Maritime Univ, Coll Ocean Sci & Engn, Shanghai 201306, Peoples R China |
| Recommended Citation GB/T 7714 | Qu, Yunpeng,Du, Yu,Fan, Guohua,et al. Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,771:699-710. |
| APA | Qu, Yunpeng.,Du, Yu.,Fan, Guohua.,Xin, Jiahao.,Liu, Yao.,...&Fan, Runhua.(2019).Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity.JOURNAL OF ALLOYS AND COMPOUNDS,771,699-710. |
| MLA | Qu, Yunpeng,et al."Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity".JOURNAL OF ALLOYS AND COMPOUNDS 771(2019):699-710. |
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