High dielectric properties and phase structure of the new kind lead-free Bi0.5Na0.5TiO3–(Ba0.85Ca0.15) (Zr0.10Ti0.90)O3 ceramics

(Bi 0.5 Na 0.5 )TiO 3 (BNT) ceramics have been frequently and widely used in recent years due to their excellent electrical performance, but their piezoelectric properties are not high enough, which limits their further applications. In this work, the (1 − x )(Bi 0.5 Na 0.5 )TiO 3 – x (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 (BNT–BCZT) ceramics with high dielectric were fabricated by solid-state sintering technique conventionally combined with two-part synthesis. A stable solid solution is created between BNT and BCZT by XRD measurement findings. The effects of different BCZT contents on the microstructure, dielectric behavior, and piezoelectric performances have been investigated in detail. The SEM measurements show that BCZT has the effect of refining grains and inhibiting grain growth, resulting in smaller grain sizes in the (1 − x )BNT– x BCZT ceramics. Compared with pure BNT ceramics, BNT-BCZT ceramics exhibit larger piezoelectric constant, lower remnant polarization, and lower coercive field. The ceramic material has the densest micro-structural and the best electrical properties as d 33 of 156 pC/N, P r of 33.70 µC/cm 2 , ε m of 3841, tan δ of 0.056, and E c of 36.27 kV/cm when x is 0.06. 0.94BNT-0.06BCZT ceramics are more easily polarized and have better electrical properties than pure BNT ceramics. So, it can be demonstrated that BCZT can enhance the comprehensive electrical properties of BNT ceramics, and it is anticipated and meaningful in the modifications of the same kind of ceramic materials.