electromagnetic wave absorbing composite structural and process parameters

Authors

1 Faculty of Polymer Engineering & Color Technolog, Amirkabir University of Technology

2 Department of Polymer Engineering and Color Technology, Amirkabir University of Technology

Abstract

The electromagnetic wave absorbing composites as new technologies have been widely used in military industries, in antenna techniques and production, for protection of humans and other biological objects from the harmful action of the electromagnetic waves and for improving the electromagnetic compatibility between different electronic devices. Both electrical and magnetic components should be absorbed together in microwave absorber coatings. Such absorption which is known as "electrical loss" and "magnetic loss". As a result, electromagnetic waves absorber pigment should have both electric and magnetic loss in order to the coating could absorb the electromagnetic waves. Ferrites provide suitable absorption properties for magnetic component in microwave absorber coatings. On the other hand, addition of impurity ions in the structure, would also improve the electrical absorption characteristics. This role could be played by carbon-based compounds in microwave absorber coating.

Keywords