Abstract Lead-free (Na0.5Bi0.5)0.4Sr0.6TiO3-xK0.73Bi0.09NbO3 (abbreviated as NBST-xKBN) ceramics with perovskite structure were prepared by a conventional solid-state reaction method. NBST ceramics modified with KBN content demonstrate strong relaxor behavior. When x = 0.05, the optimal energy storage density (1.79J/cm3), improved recoverable energy efficiency (91.02%) and the maximum dielectric breakdown strength (22.2 kV/mm) are obtained. The discharge energy density of NBST-0.05KBN are measured under the electric field from 10 kV/mm to 16 kV/mm, exhibiting good discharge energy density (1.20J/cm3) at 16 kV/mm. Complex impedance plots of NBST-xKBN exhibit great resistivity of the ceramics. In all, these results indicate that NBST-xKBN is a potential candidate for energy storage applications.

中文翻译：

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用于储能应用的弛豫铁电体 (Na0.5Bi0.5)0.4Sr0.6TiO3 基陶瓷

摘要 采用常规固相反应法制备了钙钛矿结构的无铅(Na0.5Bi0.5)0.4Sr0.6TiO3-xK0.73Bi0.09NbO3（简称NBST-xKBN）陶瓷。用 KBN 含量改性的 NBST 陶瓷表现出很强的弛豫行为。当 x = 0.05 时，获得最佳储能密度（1.79J/cm3）、提高的可恢复能量效率（91.02%）和最大介电击穿强度（22.2 kV/mm）。NBST-0.05KBN的放电能量密度在10 kV/mm至16 kV/mm的电场下测量，在16 kV/mm下表现出良好的放电能量密度（1.20J/cm3）。NBST-xKBN 的复阻抗图显示出陶瓷的高电阻率。总之，这些结果表明 NBST-xKBN 是储能应用的潜在候选者。