Significantly enhanced high permittivity and negative permittivity in Ag/ Al2O3/3D-BaTiO3/epoxy metacomposites with unique hierarchical heterogeneous microstructures

doi:10.1016/j.compositesa.2021.106559

	Significantly enhanced high permittivity and negative permittivity in Ag/ Al2O3/3D-BaTiO3/epoxy metacomposites with unique hierarchical heterogeneous microstructures
	Han, Mingli 4; Shi, Zhicheng 4; Zhang, Wenqiang 4; Zhang K(张坤)3; Wang, Huanlei 4; Dastan, Davoud 2; Fan, Runhua 1
刊名	COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
	2021-10-01
卷号	149 页码:9
关键词	Multifunctional composites Polymer-matrix composites (PMCs) Electrical properties Interface
ISSN号	1359-835X
DOI	10.1016/j.compositesa.2021.106559
通讯作者	Shi, Zhicheng(zcshi@ouc.edu.cn)
英文摘要	High dielectric permittivity materials are widely employed in various electronic devices. To satisfy the ongoing miniaturization of electronic devices, materials with further enhanced dielectric permittivities are strongly desired. In this work, a novel design of epoxy composites based on Ag/Al2O3/3D-BaTiO3 foams with hierarchical heterogeneous microstructures are prepared. It is found that, the spatial distribution of the Ag particles can be easily controlled via adjusting the Ag+/Al3+ mole ratios, yielding highly tailorable dielectric properties. When the Ag+/Al3+ mole ratios are low, the Ag particles are well isolated by surrounding Al2O3, yielding the formation of numerous equivalent micro-capacitors and substantially enhanced dielectric permittivity. Moreover, the dielectric permittivities of the composites increase with higher Ag+/Al3+ mole ratios. Consequently, a high dielectric permittivity of 160 @10 kHz, which is about 35 times that of the epoxy matrix, is achieved in the composite with a Ag+/Al3+ mole ratio of 1.8. Meanwhile, a low tangent of about 0.062 is maintained. As the Ag+/Al3+ mole ratio increases, the Ag particles become interconnected, forming Ag networks. Consequently, a plasma-like negative phenomenon which should be attributed to the plasma oscillation of free electrons in the percolative Ag networks, is observed. This work offers an effective route to design polymer composites with tailorable high permittivity and negative permittivity.
分类号	一类
资助项目	Na-tional Natural Science Foundation of China[51773187] ; Funda-mental Research Funds for the Central Universities[201961060]
WOS关键词	ENERGY-STORAGE DENSITY ; HIGH DIELECTRIC-CONSTANT ; REDUCED GRAPHENE OXIDE ; HIGH-K ; NANOCOMPOSITE ; COMPOSITES
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000689363600004
资助机构	Na-tional Natural Science Foundation of China ; Funda-mental Research Funds for the Central Universities
其他责任者	Shi, Zhicheng
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87359]
专题	力学研究所_国家微重力实验室
作者单位	1.Shanghai Maritime Univ, Inst Marine Mat Sci & Engn, Shanghai 201306, Peoples R China 2.Georgia Inst Technol, Dept Mat Sci & Engn, Atlanta, GA 30332 USA; 3.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China; 4.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China;
推荐引用方式 GB/T 7714	Han, Mingli,Shi, Zhicheng,Zhang, Wenqiang,et al. Significantly enhanced high permittivity and negative permittivity in Ag/ Al2O3/3D-BaTiO3/epoxy metacomposites with unique hierarchical heterogeneous microstructures[J]. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING,2021,149:9.
APA	Han, Mingli.,Shi, Zhicheng.,Zhang, Wenqiang.,张坤.,Wang, Huanlei.,...&Fan, Runhua.(2021).Significantly enhanced high permittivity and negative permittivity in Ag/ Al2O3/3D-BaTiO3/epoxy metacomposites with unique hierarchical heterogeneous microstructures.COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING,149,9.
MLA	Han, Mingli,et al."Significantly enhanced high permittivity and negative permittivity in Ag/ Al2O3/3D-BaTiO3/epoxy metacomposites with unique hierarchical heterogeneous microstructures".COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING 149(2021):9.