Optimization of energy-storage properties for lead-free relaxor-ferroelectric (1-x)Na0.5Bi0.5TiO3-xSr0.7Nd0.2TiO3 ceramics

High-performance energy-storage ferroelectric multilayer ceramic capacitors via nano-micro engineering

“…39,51 The radius and valence differences of these cations at A and B sites enhance random electric elds (RFS), facilitating the presence of high dynamic PNRs. 51,52 To further demonstrate the effect of the PNRs on relaxation behavior of the ceramics, the domain evolution with respect to time is measured by PFM. Fig.…”

“…39,51 The radius and valence differences of these cations at A and B sites enhance random electric fields (RFS), facilitating the presence of high dynamic PNRs. 51,52…”

Enhancing the Energy Storage Performance in Lead-Based Antiferroelectric Ceramics via Pb(Zr0.88Sn0.12)O3/(Pb0.875La0.05Sr0.05) (Zr0.695Ti0.005Sn0.3)O3-Derived Laminated Composite Structures

“…Moreover, the corresponding η is higher than 89%. In order to further appraise the advantages of the S 2 –S 4 laminated composite ceramics, we compare energy storage properties with values of previously reported such as PbZrO 3 -based, PbHfO 3 -based, AgNbO 3 -based, NaNbO 3 -based, and Na 0.5 Bi 0.5 TiO 3 -based bulk ceramics, as shown in Figure g–h. − ,,,,,,,− ,,− ,− Obviously, different systems of ceramic materials are difficult to simultaneously achieve high W rec and η. Even though a high applied electric field (>50 kV mm –1 ) has been obtained for NaNbO 3 -based and Na 0.5 Bi 0.5 TiO 3 -based ceramics, their W rec is often lower than 10 J cm –3 .…”

“…At present, many dielectric capacitors, including antiferroelectric (AFE), relaxor ferroelectric (RFE), and LD materials, are being actively studied in terms of energy storage properties. − Although AFE and RFE ceramics exhibit strong ferroelectric properties accompanied by a large P max , low E B limits the realization of high energy density. − By contrast, LD ceramics suffer from a lower dielectric constant, thus limiting P max owing to their weak polarizability . Despite extensive exploration of these three categories, a real dilemma is that E B and P max are always mutually restricted in dielectric capacitors, which results in a lower energy density.…”

Enhanced Energy-Storage Performances in Sodium Bismuth Titanate-Based Relaxation Ferroelectric Ceramics with Optimized Polarization by Tuning Sintering Temperature

“…Typical characteristics of relaxor behavior, namely broadened dielectric peaks, can be observed over the measured temperature range of 50 to 250 • C [26,27]. The temperature T m , corresponding to the maximum ε r , is related to the thermal relaxation of PNRs and the transition from rhombohedral (R3c) PNRs to tetragonal (P4bm) PNRs [28]. The variation trend of T m for each ceramic is shown in Figure 4d: T m moves toward the lower temperature range as the sintering temperature increases.…”