Dielectric properties of a composite material based on epoxy molding material and titanium dioxide

Abstract

The paper presents an assessment of the possibility of increasing the dielectric constant of an epoxy press material by introducing a filler with a high dielectric constant, as well as the possibility of using a composite for the manufacture of an antenna element. Titanium dioxide (TiO2) functions as a filler. Since TiO2 has a high dielectric constant and its introduction makes it possible to obtain composite materials with higher radio technical characteristics, while titanium dioxide increases the strength, heat resistance, and weather resistance of the composite. The effect of TiO2 filling on the permittivity of a composite material based on an epoxy material is studied. The technology of manufacturing composite material samples by mixing components in a sampler pulverizer is described. Experimental samples of a composite material with a content of titanium dioxide – 7, 30, 35 % by weight-were studied. The modes of injection molding of plates and antenna elements made of new composite material are presented. The resulting antenna elements made of composite materials fully met the technical requirements of industry standards. The physicomechanical and dielectric properties of the composite, such as Shore hardness, permittivity, and shrinkage, are given. It is shown that the experimental values of the dielectric permittivity of the samples are consistent with the data calculated by the Lichtenecker formula. Experimental studies have shown that it is possible not only to increase the dielectric permittivity of the press material by introducing titanium dioxide but also to make structural parts with high radio technical characteristics from this material. It is established that the maximum filling of TiO2 increases the dielectric permittivity of the composite material by 60 %.