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Updated: Apr 2, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
Dual-Phase Design Enables High Capacitive Energy-Storage Capacity Under Moderate Electric Fields in Relaxor
Zhouye Zhang1, Jiaju Zhang1, Zhigang Zhou1
1College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, China.
Abstract:
Advanced electronic systems rely heavily on the development of high-performance dielectric ceramic capacitors. However, achieving simultaneous improvements in both recoverable energy density (Wrec) and efficiency (η) under moderate electric fields remains a significant challenge for practical applications. In this study, we engineer a dual-phase perovskite structure in (Bi0.5Na0.5)TiO3-based ceramics through an in situ phase separation to address this issue. The resulting grain-separated dual-phase ceramics exhibit two interacting relaxor phases with distinct nanoscale polar structures and heterogeneous stress, resulting in large polarization, low polarization hysteresis, and delayed polarization saturation. Additionally, a relatively high breakdown strength is achieved through an increased bandgap, reduced oxygen vacancy concentration, and enhanced electrical homogeneity, complemented by the dual-phase structure, which increases the length and the meandering of the electrical-tree propagation path. As a result, the optimized dual-phase ceramic exhibits exceptional overall performance, with a high energy-storage coefficient of 0.014 µC/cm2 accompanied by a large Wrec of 5.84 J/cm3 and an ultrahigh η of 92% under 420 kV/cm, along with excellent stability, and robust charge-discharge characteristics. This study presents a practical strategy for designing high-performance dielectric energy-storage ceramics that operate under moderate electric fields, providing valuable insights for tailoring functional properties in ferroelectrics.
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