Structure and Dielectric Properties of BaTiO3–BiYO3 Perovskite Solid Solutions

(1− x )BaTiO 3 – x BiYO 3 [(1− x )BT– x BY] polycrystalline ceramics were prepared by solid-state reaction method. The ceramics are in tetragonal phase when x ≤ 0.04, transform to pseudocubic at x ≥ 0.06, showing a classic ferroelectric to relaxor transition at x = 0.06, where the phase transition temperature was found to shift to higher temperature with increasing frequency. The dielectric permittivity peaks were analyzed by the modified Curie–Weiss law. Both parameters ΔT diffuse and ΔT relaxor were found to increase with increasing BY content, demonstrating a stronger relaxor characteristic.