Enhanced energy-storage performance with excellent stability under low electric fields in BNT–ST relaxor ferroelectric ceramics

Abstract

Relaxor ferroelectrics are promising candidates for pulsed power dielectric capacitor applications because of their excellent energy-storage properties.

Giant Field‐Induced Strain with Low Hysteresis and Boosted Energy Storage Performance under Low Electric Field in (Bi0.5Na0.5)TiO3‐Based Grain Orientation‐Controlled Ceramics

“…[5,7] The unipolar polarization hysteresis loops of textured BNT-BT-NN ceramics measured under various electric fields are shown in Figure 5c. One can find that the textured ceramics exhibit seriously pinched polarization loops with substantial decline of remnant polarization P r and two current peaks [5][6][7]18,26,45,[70][71][72][73][74][75][76][77][78][79][80][81][82] f) Cycle number-, g) temperature-, and h) frequency-dependent normalized W rec and η -.…”

Grain boundary engineering that induces ultrahigh permittivity and decreased dielectric loss in CdCu3Ti4O12 ceramics

“…Moreover, the average grain size was estimated by statistically analyzing the grain sizes in the SEM image, and the analysis was carried out using SEM image analysis software (Nano Measurer System, 1.2.5). The density of the samples was detected using the drainage method with the Archimedes principle . The silver electrodes for characterization of electrical property were prepared by covering the top and bottom of polished CdCu 3− x Zn x Ti 4 O 12 ceramics with silver paint and heating them at 840°C for 0.5 hour.…”

“…The density of the samples was detected using the drainage method with the Archimedes principle. 2,3,9,13,28,30 The silver electrodes for characterization of electrical property were prepared by covering the top and bottom of polished CdCu 3−x Zn x Ti 4 O 12 ceramics with silver paint and heating them at 840°C for 0.5 hour. Finally, an impedance analyzer (4294A, Agilent) was used to characterize the dielectric dispersion and complex impedance.…”

“…The search for ultrahigh permittivity ( ε r > 10 3 ) materials is one of the most popular research topics in the fields of microelectronics and energy storage devices . CaCu 3 Ti 4 O 12 (CCTO), a typical ACu 3 Ti 4 O 12 (ACTO, where A = Ca, Cd, La 2/3 , Y 2/3 , Bi 2/3 , Na 1/2 La 1/2 , Na 1/2 Y 1/2 , or Na 1/2 Bi 1/2 , for example) ceramic, has been widely studied due to its ultrahigh dielectric permittivity and good frequency/thermal stability.…”

Abnormal phase transition and polarization mismatch phenomena in BaTiO3-based relaxor ferroelectrics

“…Schematic of approaches used to improve the energy storage properties of relaxor ferroelectrics. Dielectric breakdown strength of 0.7BaTiO 3 -0.3BiScO 3 ceramics as a function of sample thickness 105. …”