S.M Maroofi - Faculty of Polymer Engineering & Color Technology, Amirkabir University of Technology, Tehran, Iran- Color and Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran, Iran
A.A Sabbaghalvani - Color and Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran, Iran
H Sameie - Color and Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran, Iran
H.R Hedayati - Faculty of Polymer Engineering & Color Technology, Amirkabir University of Technology, Tehran, Iran- Color and Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran, Iran

Ferrites with a submicron grain size are some of themost promising materials in magnetic nanocomposites for theabsorption of microwave radiation [1]. 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. Ferritesprovide 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.Thisrole could be played by carbon-based compounds in microwave absorber coating.

Microwave, absorber, composite, ferrite, spinel, garnet, hexagonal