Achieving high >90% energy efficiency, up from 60 to 70%, in relaxor ferroelectric based ceramics

https://www.eurekalert.org/news-releases/1065828

"high discharge density by chemical doping, hierarchical structure, advanced sintering, defect structure engineering... aliovalent rare earth ion Smx-BNBST solid solutions thorough defect-engineered phase/domain structure competition... 2.1 J/cm3 recoverable energy density at low 114 kV/cm electric field... strengthened polarization switching, improved dielectric temperature stability via thermal evolutions, reduced Pr demonstrated by PFM measurement... multi-layer ceramic capacitors"