Structure and dielectric properties of NBT-xBT-ST lead-free ceramics for energy storage
([Formula: see text])(Na[Formula: see text]Bi[Formula: see text])TiO3-[Formula: see text]BaTiO3-0.26SrTiO3 ([Formula: see text]) (abbreviated as NBT-[Formula: see text]BT-ST) lead-free ceramics were fabricated by a solid-state reaction method. The effect of Ba doping amount [Formula: see text] on the structure and energy storage properties of NBT-[Formula: see text]BT-ST ceramics were investigated. All the NBT-[Formula: see text]BT-ST ceramics showed single perovskite structure with a pseudocubic phase. Ba doping effectively suppressed grain growth, in favor of forming small and uniform grains. The ceramics with a composition of [Formula: see text], an optimized energy storage density ([Formula: see text][Formula: see text]J/cm3) and efficiency ([Formula: see text]%), under an applied electric field of 50[Formula: see text]kV/cm, should be a candidate for solid-state compact pulsed power capacitor materials.