Stepwise Optimization Strategy of Ferroelectric-Paraelectric Laminated Ceramics

Abstract

Laminated design has garnered significant attention for enhancing the energy storage performance of ceramics. However, there remains a lack of targeted material selection and optimization criteria specifically for this structural approach. In this work, using typical ferroelectric-paraelectric laminated ceramics as a model system, a stepwise optimization strategy including laminated design integrating layer ratio adjustment, linearity modulation, and interface strengthening is proposed. The finite element and the phase-field simulation results demonstrate the significant effectiveness of this strategy in enhancing energy storage performance. The advantages of the high breakdown in paraelectric ceramics and the high polarization in ferrooelectric ceramics are well conbined through the laminated structure. Besides, the energy storage potential is further enhanced through the optimization of polarization nonlinearity and storage efficiency via linearity modulation. Furthermore, an increased number of layers are designed by modifying the stacking arrangement, greatly exploiting the blocking effect of the interface on the breakdown path and ultimately optimizing the breakdown strength of the laminated ceramics. All the simulation results give valuable guidance for pursuing a more reasonable laminated structure design with superior energy storage performance.