Antiferroelectric ceramics with unique characteristics of electric-field-induced antiferroelectric to ferroelectric phase transitions and ultra-fast charging-discharging rate, which are demanded in high pulse power devices. In this work, (Pb_0.98La_0.02)(Zr_0.45-xSn_0.55Hf_x)_0.995O₃ (PLZSH) antiferroelectric ceramics with x = 0∼0.20 were prepared via a conventional solid-state reaction approach. Incommensurate modulation structure with a 1/n<110> superlattice was observed in AFE at room temperature, which was associated with the unique domain boundaries, contributing the obvious declined AFE-FE phase transition electric field as well as the enhanced energy storage density. It was also observed that the maximum recoverable energy storage density (W_rec) increases from 2.93 J/cm³ (x = 0) to 5.72 J/cm³ (x = 0.15), and the corresponding energy-storage efficiency uprises from 82.4 % to 87.8 % with the increasing x at 280 kV/cm. The superior energy density and efficiency indicate that the obtained PLZSH antiferroelectric ceramics are promising for practical applications in pulse power devices.

反铁电陶瓷具有电场诱导反铁电到铁电相变和超快充放电速率的独特特性，这是高脉冲功率器件所需要的。本工作采用常规固相反应方法 制备了x = 0∼0.20的(Pb _0.98 La _0.02 )(Zr _0.45-x Sn _0.55 Hf _x ) _0.995 O ₃ (PLZSH)反铁电陶瓷。在室温下，AFE 中观察到具有 1/ n <110> 超晶格的不相称调制结构，这与独特的畴界相关，导致 AFE-FE 相变电场明显下降，储能密度增强。还观察到最大可恢复储能密度（W _rec）从 2.93 J/cm ³ ( x  = 0) 增加到 5.72 J/cm ³ ( x  = 0.15)，相应的储能效率从 82.4 % 上升在 280 kV/cm 时，随着 x 的增加，达到 87.8%。优异的能量密度和效率表明所获得的PLZSH反铁电陶瓷在脉冲功率器件中具有广阔的实际应用前景。