Dielectric properties of Ba(Ti1 − xZrx)O3 solid solutions

This paper reports the structural and dielectric properties of Ba(Ti1 − xZrx)O3 (x = 0–0.3) ceramics. Single-phase solid solutions of the samples were determined by X-ray diffraction. Microscopic observation by scanning electron microscope revealed dense, single-phase microstructure with large grains (20–60 μm). The evolution of dielectric behavior from a sharp ferroelectric peak (for x ≤ 0.08) to a round dielectric peak (for 0.15 ≤ x ≤ 0.25) with pinched phase transitions and successively to a ferroelectric relaxor (for x = 0.3) was observed with increasing Zr concentration. Compared with pure BaTiO3, broaden dielectric peaks with high dielectric constant of 25,000–40,000 and reasonably low loss (tanδ: 0.01–0.06) in the Ba(Ti1 − xZrx)O3 ceramics have been observed, indicating great application potential as a dielectric material.