High energy storage performances of Bi1−xSmxFe0.95Sc0.05O3 lead-free ceramics synthesized by rapid hot press sintering

Enhanced energy storage performance and thermal stability in relaxor ferroelectric (1‐x)BiFeO3‐x(0.85BaTiO3‐0.15Bi(Sn0.5Zn0.5)O3) ceramics

“…It is widely recognized that fatigue in oxide dielectrics is caused by the long-range diffusion of oxygen vacancies induced by an applied E and domain wall pinning during repeated switching of the domain wall. 22,[41][42] The excellent fatigue endurance in our samples is attributed to the highly dense microstructures, dynamic PNRs and the reduced leakage current, as shown in Figure S7.…”

“…The result shows that both W re and η remain unchanged ( W re ≈ 1.41 J/cm 3 and η ≈ 90%, respectively) as T ≤ 110°C. However, they are seriously damaged as T > 110°C due to the increased electrical conduction at elevated temperatures, 22 as confirmed by tan δ as a function of T . In addition, both W re and η also exhibit good stability against f variation (1 Hz–1 kHz), as shown in Figure .…”

“…In response to the promotion of environmental protection, demand for environment friendly dielectric capacitors for energy storage is increasing. Lead‐free dielectrics such as BaTiO 3 , (Bi,Na)TiO 3 , (K,Na)NbO 3 , and BiFeO 3 (BF)‐based systems have thus been extensively investigated 16‐24 . Among these perovskite oxide dielectrics, BF has been considered as a very promising alternative to replace lead‐free materials, due to its super large ferroelectric polarization (≈90 μC/cm 2 ) 25 .…”

“…Lead-free dielectrics such as BaTiO 3 , (Bi,Na)TiO 3 , (K,Na)NbO 3 , and BiFeO 3 (BF)-based systems have thus been extensively investigated. [16][17][18][19][20][21][22][23][24] Among these perovskite oxide dielectrics, BF has been considered as a very promising alternative to replace lead-free materials, due to its super large ferroelectric polarization (≈90 μC/ cm 2 ). 25 However, BF has some intrinsic disadvantages, such as the high electric leakage, and large hysteresis loop, limiting its application in energy storage.…”

Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review

“…A variation of HP is a ‘rapid hot-pressing’, in which powder compacts are sintered at a fast heating rate (hundreds of °C/min) at high pressure (several hundreds of MPa). To summarize, these pressure-assisted sintering techniques are excellent to promote ED properties, are time efficient, and can have better control over the stoichiometry of volatile compositions [ 128 ].…”