Superior energy density through tailored dopant strategies in multilayer ceramic capacitors

Abstract

The Gerson-Marshall (1959) relationship predicts an increase in dielectric breakdown strength (BDS) and therefore, recoverable energy density (Wrec) with decreasing dielectric layer thickness. This relationship only operates however, if the...

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

“…One such example is the bismuth titanate-strontium titanate solid solutions (BT-ST), which were previously investigated as bulk ceramics for their attractive electrical and magnetic properties [ 147 , 148 ]. Lu et al carefully adopted the composition and tuned it to reduce the charge carriers and demonstrated its effect on the ED properties [ 144 ]. The loss of volatile Bi 2 O 3 causes oxygen vacancies, which are suppressed by introducing Nb 5+ substitution at the B-site.…”

“… The recoverable energy density of several relaxor-based systems in bulk form is compared against multilayer architectures [ 76 , 83 , 138 , 139 , 140 , 141 , 142 , 143 , 144 ]. Dashed arrows are merely guides to the eye.…”

High‐energy storage density in NaNbO3‐modified (Bi0.5Na0.5)TiO3‐BiAlO3‐based lead‐free ceramics under low electric field

“…Apparently, the BDS first increases with appropriate amount of NN content, from 12.62 kV/mm at x = 0 to 17.77 kV/mm at x = 0.14, and then, decreases to 16.04 kV/mm with a further addition of the NN content. Generally, the BDS is determined by a couple of factors, such as the microstructure, [37][38] conductivity mechanism, [39][40][41] secondary phase, 42 and extrinsic parameters. For BNT-BA-xNN ceramics, the variation of BDS with increasing NN content may be related to the evolution of dielectric loss and the content of secondary phase.…”

Characterizing oxygen atoms in perovskite and pyrochlore oxides using ADF-STEM at a resolution of a few tens of picometers

“…Ceramic oxides with perovskite (ABO3) or pyrochlore (A2B2O7) structure, where A and B are cations with very different sizes, exhibit interesting physical and electrical phenomena including magnetic [1,2], ferroelectric [3][4][5][6], dielectric [7][8][9], pyroelectric [4,10], piezoelectric [4,11] and superconducting [12,13] properties. The functionality of these oxides is often dependent on microstructural defects, in particular oxygen displacement or oxygen vacancies [14][15][16][17][18][19].…”