The Effects of TiO2 Addition on the Dielectric and Microwave Properties in the Ceramic Matrix BiVO4

摘要

In this work, is studied the effects of addition of titanium oxide in the ceramic matrix bismuth vanadate per Impedance Spectroscopy (IS) for the dielectric and electric properties, numerical simulation and applications in the microwave range. The matrix phase was calcined and used to prepare the composite ceramic where forty-five percent titanium oxide was added. Molded in pellet shape and sintered and these samples were characterized by X-ray diffraction (XRD). The samples presented high relative permittivity, negative and positive values of the temperature coefficient of capacitance (TCC) and Through the IS coupled with temperature variation was measured the activation energies where the values decreasing with titanium oxide concentration. The dielectric properties (temperature coefficient of resonant frequency, dielectric permittivity, and dielectric loss) were measured and the results confirm that the titanium oxide addition improving the thermostability of the composites and increased the value of dielectric properties.