Abstract

• Rubber ferrite composites (RFCs) were prepared by incorporating ferrites in rubber matrixes has the advantage of easy flexibility. The loading of barium ferrite and nickel ferritein natural rubber matrices(120 phr) have been prepared with rubber accelerator chemical agents and using the processes of mixing, stirring and milling. The dielectric constant of the composite as well as the ferrite filler and natural rubber vulcanization was analyzed by Instek GW 821 LCR meter. The dielectric constant decreased with increase of frequency for ceramic samples of NFO and BFO, natural rubber vulcanisate and for the RFC samples. Magnetic hysteresis was measured by using a Permagraph L apparatus at room temperature. The remanence (Br) and coercivity (Hc) were derived from the hysteresis loops. From the magnetic behaviour results, a rather low density, high coercivity, large stored energy and high flexibility rubber ferrite composites was successfully obtained.