Prediction of shielding properties on electromagnetic shielding composites

被引：0

作者：

Qu, Zhaoming ^{[1
]}

Wang, Qingguo ^{[1
]}

Qin, Siliang ^{[1
]}

Hu, Xiaofeng ^{[1
]}

机构：

[1] Institute of Electrostatic and Electromagnetic Protection, Ordnance Engineering College, Shijiazhuang 050003, China

来源：

Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2012年 / 26卷 / 04期

关键词：

Magnetic shielding - Aspect ratio - Electric lines - Electromagnetic shielding - Fillers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effective electromagnetic parameters physical model of composites with ellipsoidal particles was established and prediction formulas of composites' shielding properties were derived based on variational principle and electromagnetic wave transmission theory. The shielding effectiveness and reflectivity of composites under different filling conditions were calculated and the influence laws of fillings' microstructure characters (concentration, shape, size and distribution mode) to shielding properties of composites were investigated. The shielding effectiveness and reflectivity of composites improve with the increase of concentration and aspect ratio of fillers, the needle and flaked fillers are better than spherical fillers and the directional distribution is better than random distribution, the reflectivity of composites in certain concentration and size of fillers exists peak value. The shielding composites with spherical carbonyl iron and nickel-plated short carbon fibers were prepared and the results of the numerical calculation of shielding effectiveness are in good agreement with the experiment data, the validity of proposed scheme was verified. © right.

引用

页码：419 / 424