Composition and grain size-driven ferroelectric-relaxor crossover in Ba (Zr, Ti) O

摘要: In recent years, a large number of Pb-free perovskite ceramics, mainly based on BaTiO3 solid solutions, have been studied because of their potentials as environmentfriendly materials. Barium titanate (BaTiO3) is one of the most used ferroelectrics in the electronic industry, finding extensive application as dielectric material in multilayer ceramic capacitors (MLCCs), piezoelectric actuators, electro-luminescent panels, pyroelectric detectors, embedded capacitance in printed circuit boards, positive temperature coefficient of resistivity (PTCR) sensors, controllers and pulse generating devices [1–6].One of the BaTiO3 solid solutions, BaZrxTi1-xO3 (BZT), is one of the most important compositions used as dielectric in MLCCs. The presence of Zr in the BaTiO3 unit cell results in a strong increase in the permittivity. At the same time, the temperature characteristic is smoothed due to the broadening of the