Anti-ferroelectric materials with large saturated polarization, small remnant polarization, and moderate breakdown strength are receiving increasing attention for modern high-power electrical systems. Here we demonstrated that by incorporating CaZrO₃ into NaNbO₃ ceramics, the antiferroelectricity in NaNbO₃-CaZrO₃ solid solutions could be stabilized at room temperature. The effects of phase constitution and microstructure on the dielectric properties, electrical breakdown strength, and energy storage properties of the NaNbO₃-CaZrO₃ ceramics were investigated. Ferroelectric and antiferroelectric phase coexistence in the NaNbO3-CaZrO₃ was confirmed by XRD and TEM analyses. With increasing CaZrO₃ content, the grain size was reduced, and the dielectric breakdown strength was improved. Therefore, a high energy density of 0.55 J/cm³ and efficiency of 63% was obtained in the NaNbO₃-0.04CaZrO₃ ceramics. These lead-free NaNbO₃-CaZrO₃ antiferroelectrics with good electrical energy storage can be exploited for high-power storage devices.

具有大的饱和极化，小的残余极化和中等击穿强度的反铁电材料越来越受到现代大功率电气系统的关注。在这里，我们证明了通过将CaZrO ₃掺入NaNbO ₃陶瓷中，可以在室温下稳定NaNbO ₃ -CaZrO ₃固溶体中的反铁电性。研究了相组成和微观结构对NaNbO ₃ -CaZrO ₃陶瓷的介电性能，电击穿强度和储能性能的影响。NaNbO3-CaZrO ₃中的铁电和反铁电相共存XRD和TEM分析证实了这一点。随着CaZrO ₃含量的增加，晶粒尺寸减小，介电击穿强度提高。因此，在NaNbO ₃ -0.04CaZrO ₃陶瓷中获得了0.55J / cm ³的高能量密度和63％的效率。这些具有良好电能存储的无铅NaNbO ₃ -CaZrO ₃反铁电材料可用于大功率存储设备。