A5077976304- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Dielectric materials and actuators
- Perovskite Materials and Applications
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Materials and Technologies
Guangxi University
2021-2023
Next-generation advanced high/pulsed power capacitors urgently require dielectric materials with outstanding energy storage performance. The Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-based lead-free material exhibit high polarization, but the remanent polarization and large hysteresis limit its application in capacitors. Herein, high-entropy perovskite relaxor ferroelectrics...
Antiferroelectrics (AFEs) possess great potential for high performance dielectric capacitors, due to their distinct double hysteresis loop with maximum polarization and low remnant polarization. However, the well-known NaNbO3 lead-free antiferroelectric (AFE) ceramic usually exhibits square-like P–E related irreversible AFE P phase ferroelectric (FE) Q transition, yielding recoverable energy storage density (Wrec). Herein, significantly improved Wrec up 3.3 J/cm3 good efficiency (η) of 42.4...
Chemical pressure is widely applied to antiferroelectrics (AFEs) as a criterion enhance their antiferroelectricity. However, NaNbO3 (NN)-based ceramic with well-defined double polarization hysteresis (P–E) loops was rarely reported based on this strategy, and the effect of chemical antiferroelectricity remains be understood. In work, Me cations (Me Ti, Sn, Zr) different ionic radii were introduced into component system 0.76NaNbO3–0.20AgNbO3–0.04CaMeO3 tune negative investigate its The...
Dielectric ceramics with outstanding energy storage performance are urgently expected for capacitors. In this work, high density were achieved by deliberately designing a (1 -x )Bi 0.5 Na TiO 3 - x AgNb Ta O (100 ANT) relaxor antiferroelectrics, associating defect engineering. Both behaviour and evident antiferroelectric characteristic successfully realized through phase structure engineering to an tetragonal (T) dominant structure. Furthermore, was also adopted sintering in flowing oxygen...