Effect of Dy2O3 content on the dielectric, ferroelectric, and energy storage properties of lead-free 0.5Na0.5Bi0.5TiO3–0.5SrTiO3 bulk ceramics

Thermally stable dielectric properties of 0.5Na0.5Bi0.5TiO3–0.4SrTiO3–0.1BiFeO3 ceramics at high temperature

“…At 70 kV/cm, the calculated energy storage density is 0.95 J/cm 3 . The value is 1.6 times of 0.5NBT-0.5STO ceramic at this field [8] and is comparable with other lead-free relaxor ceramics [7]. Combining the high dielectric permittivity of the ceramic in comparison with other systems [7] and the polarization has yet saturated according to Fig.…”

“…Thus, its solid solutions have been extensively studied either to improve the insulating property and/or form the so-called morphotropic phase boundary to improve electromechanical properties [5,6]. Recently, NBT-based solid solutions have been considered as the ceramic materials for electrical energy storage applications [7,8] and as the thermally stable dielectric materials for high-temperature applications [9,10,11] (x = 0.3, y = 0.2) ceramic exhibiting a temperature-stable dielectric permittivity of 1300 ± 15% from −50 to 330°C [10]; Shi et al reported that 0.94(Bi 0.5−y Na 0.5 ) − xBa 0.06 (Bi 0.2 Sr 0.7 □ 0.1 ) x TiO 3 (x = 0.26, y = 0.07) with a dielectric permittivity of 4884 ± 10% from 50 to 270°C [12]. These results suggest that NBT-based solid solution ceramics are potential dielectric materials for hightemperature applications.…”

Achieving Enhanced Energy‐Storage Performances in Bi0.5(K0.15Na0.85)0.5TiO3 Ceramics Modified by Sr(Ti0.85Zr0.15)O3

“…[ 14 ] SrTiO 3 has large breakdown strength and very small P r , which can be introduced into ferroelectric material to form solid solutions, [ 15 ] and improved energy properties were realized. [ 16,17 ] The optimum η (91.4%) and W re (3.13 J cm −3 ) were achieved in Sr(Ti 0.85 Zr 0.15 )O 3 modified (Na 0.5 Bi 0.5 ) 0.7 Sr 0.3 TiO 3 ceramic at 262 kV cm −1 . [ 18 ]…”

High energy storage density and efficiency in nanostructured (Bi0.2Na0.2K0.2La0.2Sr0.2)TiO3 high‐entropy ceramics

“…5 However, their large remnant polarization (∼38 μC/cm 2 ) lowers the recoverable energy storage density. 6,7 To further improve the energy storage performance of BNT-based ceramics, solid solutions containing BNT and other lead-free perovskite components, such as BaTiO 3 , 8 Bi 0.5 K 0.5 TiO 3 , 9 K 0.5 Na 0.5 NbO 3 , 10 and SrTiO 3 , 11 have been developed. These solid solutions provide a new insight into the structure optimization of BNT-based ceramics, typically through elemental doping and introducing chemical disorder to their A-or/and B-sites.…”

“…In BNT, a phase transition between a ferroelectric (FE) phase with a rhombohedral symmetry and an intermediate antiferroelectric (AFE) phase with an incommensurate structure could occur at about 200°C, while at 320°C there is a second‐order phase transition from the possible AFE phase to a paraelectric (PE) phase with a tetragonal symmetry, accompanied by the maximum dielectric permittivity 5 . However, their large remnant polarization (∼38 μC/cm 2 ) lowers the recoverable energy storage density 6,7 . To further improve the energy storage performance of BNT‐based ceramics, solid solutions containing BNT and other lead‐free perovskite components, such as BaTiO 3 , 8 Bi 0.5 K 0.5 TiO 3 , 9 K 0.5 Na 0.5 NbO 3 , 10 and SrTiO 3 , 11 have been developed.…”