LAUSR

ABSTRACT The (1-x)Ba(Ti, Sn)O3 -xBi(Zn0.5Ti0.5)O3 lead-free ceramics with x = 0, 0.025, 0.05, 0.075 and 0.1 were prepared by the reaction sintering method. The effects of Bi(Zn0.5Ti0.5)O3 substitution on the densification, phase structure, microstructure and electrical properties of Ba(Ti, Sn)O3 ceramics were investigated. The results showed that the highest density of 6.22 ± 0.04 g/cm3 was achieved in x = 0.1 composition. The crystal structure was found to change from tetragonal in x = 0 composition to cubic at x ≥ 0.025. The room-temperature dielectric constant reaching to 39,560 (1 kHz) with low dielectric loss was achieved in ceramic with x = 0.025. The grain size and Curie temperature were significantly decreased when Bi(Zn0.5Ti0.5)O3 content increased. The AC complex impedance spectroscopy technique was also used to obtain the electrical parameters of (1-x)Ba(Ti, Sn)O3 -xBi(Zn0.5Ti0.5)O3 ceramics. As a result, adding Bi(Zn0.5Ti0.5)O3 is an effective way to enhance the densification and dielectric properties of Ba(Ti, Sn)O3 ceramics.