Lead‐Free Ceramics with High Energy Density and Reduced Losses for High Temperature Applications1 . Issue 6 (3rd March 2017) - Correia, Tatiana
Abstract : The major limiting factors for the use of ceramic capacitors in power electronics are size and temperature stability. Ferroelectric ceramics very often exhibit high energy density, but fail to provide stable and efficient performance at high temperatures. Here, the authors report on a lead‐free BiFeO3 ‐SrTiO3 ceramic capacitor exhibiting unprecedented low dielectric loss and high thermal stability, while maintaining high energy density and fast discharge rates up to 200 °C. These unique properties clearly outperform other state of the art ceramics and potentially create significant new markets for high capacity ceramic capacitors at high frequencies and high temperature operations. Abstract : The major limiting factors for the use of ceramic capacitors in power electronics are size and temperature stability. Here, the authors report on a new lead‐free BiFeO3 –SrTiO3 multilayer ceramic capacitor, exhibiting unprecedented low dielectric loss, and high thermal stability while maintaining high energy density up to 200 °C, with the potential to create significant new markets for high capacity ceramic capacitors.