Abstract
We sintered K0.5Bi0.5TiO3 ceramics by a solid-state reaction process with the addition of CuO. X-ray diffraction patterns indicate that the synthesized K0.5Bi0.5TiO3 ceramics have the cubic perovskite phase. Scanning electron microscopy images show that the addition of CuO has a marked influence on grain size and relative density of K0.5Bi0.5TiO3 ceramics. K0.5Bi0.5TiO3 ceramics have the smallest grain size and highest relative density when the weight percentage addition of CuO is 2%. The results of temperature dependence of the dielectric constant of synthesized ceramics show that they have the highest value at a temperature of about 382°C. This behavior originates from the disordered structure and fluctuations of composition in ferroelectric systems.
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