Ultrahigh electrostrictive effect in potassium sodium niobate-based lead-free ceramics

Enhancing energy storage performance in Na0.5Bi0.5TiO3-based lead-free relaxor ferroelectric ceramics along a stepwise optimization route

“…The high concentration region of x = 0.02 ceramic exhibits a significant nonlinear polarization behavior, based on the different polarization intensity and behavior reflected by the background shade. 32 As a result, the increased P m in the inset curves is generated by domain flipping and domain wall motion driven by ferroelectric behavior. In the case of x = 0.08 ceramic, the high-strength region near the origin becomes more dispersed, and the area of long-range polarization order gradually declines, implying that the ferroelectricity is weakened, the long-range FE order is broken, and relaxor behaviour is enhanced.…”

Enhanced Energy Storage Properties in Lead-Free (Na0.5Bi0.5)0.7Sr0.3TiO3-Based Relaxor Ferroelectric Ceramics through a Cooperative Optimization Strategy

“…The incorporation of NN promoted the transformation of the crooked curves to relatively linear loops, reduced P m and P r at the same time, and generated a slimmer P−E loop, suggesting the evolution of the domain structure and the effect of PNRs. To explore the intuitive polarization switching behavior caused by the aforesaid transition, 47 the first-order reversal curves (FORCs) of the x = 0.05 and x = 0.15 ceramics under 60 kV/cm are displayed in Figures 4e and 4f, respectively. The high-strength distribution of the x = 0.05 ceramics at the origin reflects a few FE phases and strong nonlinear polarization behavior.…”

Simultaneously achieving high energy storage performance and low electrostrictive strain in BT‐based ceramics

“…As x increases, it decreases gradually, from 0.037% to 0.026%. The electrostrictive effect suggests that S = Q 33 P 2 , where Q 33 is the longitudinal electrostrictive coefficient 10 . Thus, in Figure 5A2–C2, the strains are plotted as the function of polarization.…”

“…Recently, relaxor ferroelectrics (RFEs) with high P max and ultralow P r have shown a tremendous promise for high W rec because to their nanoscale inhomogeneous structure 2,3 . More crucially, in RFEs, the hysteresis of polarization and electrostrain responses is much lower than in FEs and AFEs 10 . As a result, RFEs are attractive candidates and have been widely explored for applications in pulse powder capacitor devices throughout the last decade 1–3,11 …”

“…2,3 More crucially, in RFEs, the hysteresis of polarization and electrostrain responses is much lower than in FEs and AFEs. 10 As a result, RFEs are attractive candidates and have been widely explored for applications in pulse powder capacitor devices throughout the last decade. [1][2][3]11 BaTiO 3 (BT) ferroelectric ceramics are typically converted into RFE ceramics through doping, process optimization, and other techniques in order to achieve high W rec , high η and high dielectric breakdown strength (DBS, E b ).…”