Composition-induced phase evolution and high strain response in Ba(ZnNb)O-modified (BiNa)TiO-based lead-free ferroelectrics.

In this work, a paraelectric complex perovskite Ba(ZnNb)O (BZN) was introduced into the morphotropic boundary composition (BiNa)BaTiO (BNBT) to modulate the phase structure and electrical properties as well as the field-induced strain behavior. Using a columbite route, the ceramics with pure perovskite structure were successfully fabricated. The structure and electrical measurements showed that the introduction of BZN into BNBT results in the decrease of the rhombohedrality 90-, and promotes the evolution from ferroelectric to antiferroelectric (AFE) relaxor.