Characterization of the electrical and dielectric properties of barium titanate doped with Holmium oxide and manganese oxide and sintered microwave

Barium titanate is one of the most important piezoelectric materials used in microelectronic devices such as ultrasonic devices, sensors, transducers, etc. This is due to the high dielectric constant and low dielectric losses of this material. These types of materials have a perovskite crystal system. In this study, barium titanate was synthesized by wet chemistry and its powder doped by holmium oxide and manganese oxide. The effects of these additives on the secondary phases formed, shape, and morphology of particles and dielectric properties of the samples are discussed.The microstructure of the samples was investigated by field emission scanning electron microscopy (FESEM). X-ray diffraction analysis was used to investigate the formation of phases. The surface of the specimens was gold-coated to measure their dielectric properties by precisionLCR meter. The dielectric properties depend on the frequency and sintering method and the frequency variations affect the dielectric constant and dielectric losses. Microwave samples had better dielectric properties than microwave samples, and the particle shapes differed in the twosintering methods. This is due to differences in the heating mechanism.

Keywords:

piezoelectric materials , Dielectric properties , Microwave sintering , secondary phases