Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity

doi:10.1016/j.jallcom.2018.09.049

	Low-temperature sintering Graphene/CaCu3Ti4O12 nanocomposites with tunable negative permittivity
	Qu, Yunpeng 1; Du, Yu 2,3; Fan, Guohua 1; Xin, Jiahao 4; Liu, Yao 1; Xie, Peitao 1; You, Shuxin 1; Zhang, Zidong 1; Sun, Kai 4; Fan, Runhua 4
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-01-15
卷号	771 页码:699-710
关键词	Negative permittivity Meta-composites Graphene Metamaterials CaCu3Ti4O12
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2018.09.049
英文摘要	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.
资助项目	National Natural Science Foundation of China[51771104] ; National Natural Science Foundation of China[51402170]
WOS关键词	LOW DIELECTRIC LOSS ; GRAPHENE OXIDE ; MECHANICAL-PROPERTIES ; CACU3TI4O12 CERAMICS ; INDEX METAMATERIALS ; POLY(VINYL ALCOHOL) ; REFRACTIVE-INDEX ; RADIO-FREQUENCY ; COMPOSITES ; BEHAVIOR
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000449621500089
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/26636]
专题	中国科学院过程工程研究所
通讯作者	Liu, Yao; Zhang, Zidong
作者单位	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
推荐引用方式 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.