Percolative silver/alumina composites with radio frequency dielectric resonance-induced negative permittivity
Percolative silver/alumina composites with radio frequency dielectric resonance-induced negative permittivity
复制标题
具有射频介电共振诱导负介电常数的渗流银/氧化铝复合材料
DOI：
10.1039/c5ra21808j
复制
发表时间：
2015-12
期刊：
影响因子：
3.9
通讯作者：
Wang Xin
中科院分区：
文献类型：
--
作者：
Shi Zhi-cheng;Mao Fan;Wang Jing;Fan Run-hua;Wang Xin
逾渗现象对于多组分材料，特别是高介电常数复合材料的制备具有重要意义。目前，大多数研究集中在低于逾渗阈值的复合材料，因为高填充分数通常导致增强的损失，这对于高k应用是不期望的。然而，应该指出的是，有耗材料也可能有巨大的潜在应用在微波吸收，电磁衰减和屏蔽领域等，因此，它是感兴趣的澄清复合材料的介电行为超越逾渗。本文研究了银/氧化铝复合材料在逾渗条件下的介电性能。有趣的是，金属-绝缘体转变，电容-电感转变，射频介电共振出现沿着的渗流现象。这些现象之间的相互关系进行了讨论。详细讨论了射频介电谐振引起负介电常数的机理。阐明导电体/绝缘体复合材料的介电性质，对于开发具有迷人性能和应用的新型介电材料具有重要意义。
The percolation phenomenon has great significance for multi-component materials, especially for the preparation of high-k composites. At present, most research focuses on composites below the percolation threshold because the high filling fraction usually results in enhanced losses, which are undesirable for high-k applications. However, it should be noted that lossy materials also may have huge potential applications in microwave absorbing, electromagnetic attenuation and shielding fields, etc. Therefore, it is of interest to clarify the dielectric behaviors of composites beyond percolation. Herein, the dielectric properties of silver/alumina composites beyond percolation are investigated. Interestingly, metal–insulator transition, capacitive–inductive transition, and radio frequency dielectric resonances appear along with the percolation phenomenon. The interrelationships between these phenomena are discussed. The mechanism of the radio frequency dielectric resonance-induced negative permittivity is discussed in detail. Clarification of the dielectric properties of conductor/insulator composites beyond percolation has great significance for the development of novel dielectric materials with fascinating properties and applications.
登录
查看更多内容
ε-负超材料夹层结构的多通道滤波特性
影响因子：
3.2
作者：
Liu, Yan-Hong;He, Li;Yang, Cheng-Quan
通讯作者：
Yang, Cheng-Quan
影响因子：
5.7
作者：
Jae-Hyun Park;Young-Ho Ryu;Jae‐Gon Lee;Jeong‐Hae Lee
通讯作者：
Jae-Hyun Park;Young-Ho Ryu;Jae‐Gon Lee;Jeong‐Hae Lee
影响因子：
4.6
作者：
V. G. Shevchenko;S. V. Polschikov;P. M. Nedorezova;A. N. Klyamkina;A. Shchegolikhin;A. M. Aladyshev;
通讯作者：
V. G. Shevchenko;S. V. Polschikov;P. M. Nedorezova;A. N. Klyamkina;A. Shchegolikhin;A. M. Aladyshev;
基于相位不连续的C形复杂超材料的宽带太赫兹波偏转
影响因子：
29.4
作者：
Zhang, Xueqian;Tian, Zhen;Zhang, Weili
通讯作者：
Zhang, Weili
影响因子：
2.9
作者：
T. Mackay;A. Lakhtakia
通讯作者：
T. Mackay;A. Lakhtakia