Microwave Absorber Sheet of the Composite Silicon Rubber Iron Oxide

Microwave absorber sheet is a composite of silicon rubber - iron oxide. The composite was prepared by silicon rubber, toluene, and magnetic powder of iron oxide. The raw material was blended in the beaker glass for 60 min and then pressed at temperature of 70 degrees C for 15 min. The unsure analysis showed that the sample contained carbon, oxygen, sulfur, zinc, lanthanum, barium, manganese, titanium and iron. The refinement results of x-ray diffraction pattern show that the sample is semicrystalline with the crystallinity of 46%. The sample consist of the matrix is amorphous phase and the filler is crystalline phase. The filler consist of two phases, namely iron oxide and iron metal phases. The functional groups analysis show that the sulfur addition modified the polymer by forming crosslink (bridges) between individual polymer chains and bonding between magnetic filler and rubber matrix. We concluded that this study has been successfully made a composite of silicon rubber - iron oxide for microwave absorber sheet application.