Low Electric Field Induced High Energy Storage Capability of the Free-Lead Relaxor Ferroelectric 0.94Bi0.5na0.5tio3-0.06Batio3-based Ceramics

Morphotropic phase (MPB) eco-friendly ferroelectric 0.94Bi(0.5)Na(0.5)TiO(3)- 0.06BaTiO(3) (NBT-BT) ceramics exhibits superior piezoelectric performances. However, the large remnant polarization (Pr) and low breakdown strength (E-b) of NBT-BT systems hinders application in energy storage capacitors. Herein, the Bi(Zn1/3Nb2/3)O-3 (BZN) is selected to partially replace the NBT-BT ceramics to break ferroelectric long-range order domains achieving higher energy storage properties. Highly recoverable energy storage density (W-rec similar to 3 J/cm(3)) and efficiency (eta similar to 75%) are acquired in (NBT-BT)-0.06BZN ceramics under a low applied electric field of 210 kV/cm. Furthermore, superior temperature stability (20-120 degrees C), and frequency (1-1000 Hz) stability, and fatigue endurance (10(5) st) are also gained. These advantages further suggest that the (NBT-BT)-0.06BZN ceramics exhibit great promise in pulsed power markets.