Antiferroelectric-liner dielectric solid solutions leading to large energy density and ultrahigh efficiency in PBLZST-CZT ceramics

作者：Liu, Pin; Zhu, Guoyin; Zhang, Qingfeng^*; Zhang, Haibo^*

来源：Ceramics International, 2022, 48(12): 16933-16943.

DOI：10.1016/j.ceramint.2022.02.248

• Energy storage density and efficiency
• Antiferroelectric ceramics
• Linear dielectrics
• Solid solutions

A novel strategy to improve the energy-storage density and efficiency of the antiferroelectric (Pb0.93Ba0.04La0.02) (Zr0.65Sn0.3Ti0.05)O3 (PBLZST) ceramics is presented by forming ceramic solid solutions. The introduction of linear dielectric Ca(Zr0.5Ti0.5)O3 into PBLZST can effectively increase the breakdown strength, the antiferroelectric-to-ferroelectric phase transition field (EF) and the ferroelectric-to-antiferroelectric phase transition field (EA), while decreasing Delta E = EF - EA and the dielectric loss. This novel strategy leads to an ultrahigh efficiency of 94% and a remarkably high density of 4.14 J/cm3 in the PBLZST-based ceramics. The fundamental origins of high energy-storage density and efficiency are attributed to the enhanced tolerance factor and electronegativity difference in the complex perovskite structure, as well as the linear dielectric properties of Ca (Zr0.5Ti0.5)O3. Our results qualify the antiferroelectric PBLZST ceramics as innovative and promising candidate for energy storage applications. Furthermore, it points out an effective approach to achieve high efficiency in antiferroelectric by forming ceramics with linear dielectric.

• 单位
  华中科技大学