Structural, dielectric and electrical properties of Bi/K co-doped BaTiO3 ferroelectric ceramics

Abstract

Lead-free ferroelectric ceramic (Ba0.8Bi0.1K0. 1) TiO3 prepared by conventional solid state synthesis route and well sintered at 1200 °C. The room-temperature x-ray diffraction and FESEM data analysis confirmed the phase structure, space group, lattice parameters, and microstructure. The dielectric properties in a wide frequency and temperature range show a fully temperature dependent dielectric constant (with transition at 184°C) and a very low dielectric loss at lower temperatures. The impedance investigation (Nyquist plot) demonstrates non-Debye type conduction, NTCR behavior, and grain and grain boundary contributions. Given the aforementioned traits, it can be used in the electronics industry.