Structure and properties of LiNbO3 doped Bi(Mg1/2Ti1/2)O3–PbTiO3 ceramics with the morphotropic phase boundary composition

Abstract

(1−x){0.62Bi(Mg1/2Ti1/2)O3–0.38PbTiO3}–xLiNbO3 (BMT–0.38PT–xLN, 0.00 ≤ x ≤ 0.06) ceramics were prepared by the conventional mixed oxide method. It showed that all compositions belong to the pseudocubic phase when LN doped into BMT–0.38PT ceramics, meanwhile piezoelectric properties declined. With LN content increasing, a change from a ferroelectric behavior to an abnormal diffuse behavior was observed. Furthermore, stable dielectric permittivity (1,300–3,800) and low losses were obtained in the temperature range 100–400 °C for 0.02 ≤ x ≤ 0.06 samples, indicating a potential for high-temperature applications.