HIGH ENERGY DENSITY CAPACITOR AND DIELECTRIC MATERIAL THEREFOR

摘要

A high capacity capacitor (10) include a spacer element (18) formed of a high energy density dielectric material, specifically doped bismuth ferrite. The additive includes strontium and titanium. The doping agent has the effect of increasing the difference between the saturation polarisation and the remnant polarisation of bismuth ferrite as well as reducing charge leakage, making bismuth ferrite a suitable material for a high energy density capacitor. The doped bismuth ferrite exhibits good temperature stability.