Experimental and numerical studies of dielectric properties of BaTiO3-platinum composites at microwave frequencies

The conductor loading method has been used for creating a lossy dielectric material with a desired loss tangent. This method may also be applicable for developing high dielectric constant materials. In this paper, we will present the experimental results of the dielectric properties of BaTiO₃ and BaTiO₃ -platinum (BaTiO₃-Pt) composites. These composite materials were designed to increase the real part of the effective dielectric constant at high frequency. Three different platinum volume fractions were used, 3, 5 and 10%, to make BaTiO₃-Pt composites, in addition to a pure BaTiO₃ material. To characterize the BaTiO₃-Pt composites, microwave frequency measurements were conducted using the waveguide transmission technique. The experimental and numerical results verify that it is possible to increase the dielectric constant using the conductor loading method.