Negative permittivity adjusted by SiO2-coated metallic particles in percolative composites
Negative permittivity adjusted by SiO2-coated metallic particles in percolative composites
复制标题
渗流复合材料中 SiO2 涂层金属颗粒调节负介电常数
DOI：
10.1016/j.jallcom.2017.04.248
复制
发表时间：
2017-11
影响因子：
6.2
通讯作者：
Schumacher Gerhard
中科院分区：
文献类型：
--
作者：
Xie Peitao;Sun Kai;Wang Zhongyang;Liu Yao;Fan Runhua;Zhang Zidong;Schumacher Gerhard
负介电常数是近年来渗透复合材料研究的热点。然而，如何有效地调整负介电常数仍然是一个尚未解决的挑战。本文采用共混和热成型工艺制备了均匀分散于环氧树脂中的sio2包覆金属颗粒渗透复合材料。负介电常数以三维金属网络的形式实现，并通过包覆颗粒的分布精确调节负介电常数的取值和频率范围。德鲁德模型分析表明，负介电常数是由电子浓度稀释引起的低频等离子态引起的。此外，包覆颗粒还可以改变复合材料中电子的导电路径，导致电导率与填料含量之间存在不寻常的线性关系，等效电路分析进一步证实了这一点。本研究将促进负介电常数材料在电磁屏蔽、吸收、衰减等方面的应用。
Negative permittivity has taken off as a research topic recent years in percolative composites. However, how to effectively tune the negative permittivity is still a challenge remained unsolved. Herein, the percolative composites with SiO2-coated metallic particles homogeneously dispersed in epoxy resin were prepared using blending and hot-molding procedure. The negative permittivity was realized with the form of three-dimensional metallic network, and the value and frequency range of negative permittivity were precisely adjusted by the distribution of coated particles. The analysis of Drude model indicated that negative permittivity was attributed to low frequency plasmonic state from the dilution of electron concentration. Moreover, coated particle can also change conductive path of electrons in composite, leading to an unusual linear relationship between conductivity and filler content, which is further certified by the equivalent circuit analysis. Our reported work would facilitate applications of negative permittivity materials especially in electromagnetic shielding, absorbing, attenuation and so on.
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渗流银/钇铁石榴石纳米复合材料中具有类法诺共振和磁性的可调负介电常数
影响因子：
3.7
作者：
Sun Kai;Fan Runhua;Yin Yansheng;Guo Jiang;Li Xiaofeng;Lei Yanhua;An Liqiong;Cheng Chuanbing;Guo Zhanhu
通讯作者：
Guo Zhanhu
影响因子：
3.7
作者：
S. Chui;Liangbin Hu
通讯作者：
S. Chui;Liangbin Hu
影响因子：
19
作者：
Yang Shen;Zhenxing Yue;Menglei Li;C. Nan
通讯作者：
Yang Shen;Zhenxing Yue;Menglei Li;C. Nan
影响因子：
4
作者：
Shi, Z. C.;Fan, R. H.;Yin, L. W.
通讯作者：
Yin, L. W.
DOI：
10.1103/physrevapplied.3.054010
发表时间：
2015-01
期刊：
arXiv: Superconductivity
影响因子：
--
作者：
C. Kurter;T. Lan;L. Sarytchev;S. Anlage
通讯作者：
C. Kurter;T. Lan;L. Sarytchev;S. Anlage