Broadband Dielectric Spectroscopy of Composites Filled With Various Carbon Materials

被引：13

作者：

Bellucci, Stefano ^{[1
]}

Bistarelli, Silvia ^{[1
]}

Cataldo, Antonino ^{[1
]}

Micciulla, Federico ^{[1
]}

Kranauskaite, Ieva ^{[2
]}

Macutkevic, Jan ^{[2
]}

Banys, Juras ^{[2
]}

Volynets, Nadezhda ^{[3
]}

Paddubskaya, Alesya ^{[3
]}

Bychanok, Dmitry ^{[3
]}

Kuzhir, Polina ^{[3
,4
]}

Maksimenko, Sergey ^{[3
,4
]}

Fierro, Vanessa ^{[5
]}

Celzard, Alain ^{[5
]}

机构：

[1] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[2] Vilnius Univ, Radiophys Dept, LT-01513 Vilnius, Lithuania

[3] Belarusian State Univ, Res Inst Nucl Problems, Minsk 220030, BELARUS

[4] Natl Res Tomsk State Univ, Radiophys Dept, Tomsk 634050, Tomsk Oblast, Russia

[5] Univ Lorraine, CNRS 7198, IJL UMR, ENSTIB, F-88026 Epinal, France

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2015年 / 63卷 / 06期

关键词：

Carbon; electromagnetic interference (EMI) shielding; epoxy resin; graphite; percolation; permittivity;

D O I：

10.1109/TMTT.2015.2418758

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Epoxy matrix-based composite materials filled with various carbon additives, such as natural, artificial and exfoliated graphites (EGs), activated carbons, and thick graphene, were fabricated. Results of their broadband dielectric spectroscopy in wide frequency range, from a few hertz to a few terahertz are reported. The lowest percolation threshold (below 1.5 wt. %) as well as the highest electromagnetic interference (EMI) shielding capacity are observed for composites containing EG. Using an original random resistor-capacitor-diode network model, we proved theoretically that 2 wt.% of EG in the epoxy host is an optimal composition, as it provides high EMI shielding efficiency at the level of 17 dB for a 1.4-mm-thick polymer slice, and at the same time, does not lead to a significant decrease of other important physical properties of epoxy.

引用

页码：2024 / 2031

页数：8

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