Preparation and Dielectric Properties of Bi(Mg0.5Ti0.5)O3 Ceramics Doped with Ba0.85Ca0.15Zr0.1Ti0.9O3

Researches on Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) ceramics revealed that their low energy storage density and efficiency limit their applications. This study prepared (1–x)Ba0.85Ca0.15Zr0.1Ti0.9O3–xBi(Mg0.5Ti0.5)O3 (abbreviated as (1–x)BCZT–xBMT, x = 0, 0.01, 0.05, 0.07, and 0.1) ceramics using the solid-state method. We looked closely at how the degree of BMT doping affected the BCZT ceramics’ structures and characteristics. The results indicate that all samples with different compositions exhibit the pure phase and dense microstructures. The doping with BMT significantly improves both energy storage efficiency and density. 0.93BCZT-0.07BMT ceramics achieve an efficiency of 65.9% and an energy storage density of 1.09 J/cm3. The improvement in energy storage performances can be attributed to appropriate BMT doping, which densifies the system, refines grain size and facilitates the transition of the system from ferroelectric to relaxor ferroelectric.