Simultaneously enhanced energy density and discharge efficiency of (Na_0.5Bi_0.5)_0.7Sr_0.3TiO₃-La_1/3(Ta_0.5Nb_0.5)O₃ lead-free energy storage ceramics via grain inhibition and dielectric peak flattening engineering

Abstract

Energy storage ceramics are widely favored for their rapid charging/discharging speed, good temperature stability and large power density. Nevertheless, most of lead-free energy storage ceramics can achieve excellent energy storage...

Dielectric, Ferroelectric, and High-Temperature Strain Behavior of Rare Earth Ce-Doped 0.67BiFeO3–0.33BaTiO3 Lead-Free Ferroelectric Ceramics

“…As x increased, the samples exhibited significant dielectric frequency dispersion, with the peak temperature ( T m ) decreasing as the frequency decreased. This confirms the relaxor behavior of BF–BT–Ce ceramics, indicating a transition from normal ferroelectric material to a relaxor ferroelectric material . It is evident from the text that the decrease in T m with increasing x is attributed to the introduction of Ce 4+ doping in lead-free BF-BT ceramics, resulting in lattice irregularities that adversely affect the formation and stability of the electric dipole moment.…”

“…This confirms the relaxor behavior of BF−BT−Ce ceramics, indicating a transition from normal ferroelectric material to a relaxor ferroelectric material. 29 It is evident from the text that the decrease in T m with increasing x is attributed to the introduction of Ce 4+ doping in lead-free BF-BT ceramics, resulting in lattice irregularities that adversely affect the formation and stability of the electric dipole moment. This ultimately disrupts the stability of the ferroelectric phase, leading to a reduction in the T m .…”