Ferroelectric transitions in silver niobate ceramics

Abstract

Silver niobate (AgNbO3)-based dielectric materials show great application potential in pulse power energy storage systems due to their high energy storage density.

Impact of Li Doping on the Structure and Phase Stability in AgNbO3

“…Next we consider the nature of the proposed P2 1 ma to Pcam transition. It is not possible to distinguish the Pcam and P2 1 am structures from the appearance of the PND profiles, since these two space groups allow the same reflections, although Yashima 44 and Tian 45 have shown by using electron diffraction that the latter space group is appropriate at room temperature. Niranjan et al 46 reported that the P2 1 am model provided a superior fit to medium resolution PND data compared with the nonpolar Pbcm (alternate setting of Pcam).…”

Silver niobate perovskites: structure, properties and multifunctional applications

“…2b. 13,16 The discovery of "double" polarization hysteresis under strong electric elds indicated that AgNbO 3 could potentially replace Pb-based antiferroelectrics in energy storage applications. Based on chemical composition adjustments, the eldinduced phase transitions and the associated physical properties can be optimized.…”

Ultrafast Discharge and Enhanced Energy Density of Polymer Nanocomposites Loaded with 0.5(Ba0.7Ca0.3)TiO3–0.5Ba(Zr0.2Ti0.8)O3 One-Dimensional Nanofibers

“…1−5 The discharged energy density of a capacitor (U c ) is expressed as U c = ∫ EdD, where D is the electric displacement and E is the dielectric breakdown strength. 6 D is described as D = ε r E, which means large ε r (dielectric constant) tends to increase D under the applied electric field. However, there are still critical challenges that maximize both dielectric breakdown strength (E b ) and dielectric constant (ε r ) for high-performance dielectric materials.…”