Ferroelectric (1-x)Sr_0.875Pb_0.125TiO₃-xBi(Mg_0.5Zr_0.5)O₃ ((1-x)SPT-xBMZ, x = 0-0.2) ceramics with high discharge efficiency and power density were synthesized via a conventional solid-state sintering method. The prepared (1-x)SPT-xBMZ ceramics were detected as a pure perovskite structure and a dense microstructure, and a typical relaxor behavior and an excellent temperature stability were also observed. Although there is no direct correlation between the degree of diffuseness and the maximum polarization, the high degree of diffuseness can reduce the remanent polarization and significantly improve energy storage and release characteristics of ferroelectric ceramics. Based on a polarization electric-field loop measurement, a recoverable energy storage density of 0.762 J/cm³ and a very high efficiency of 96.34% are achieved when x = 0.2 under 150 kV/cm. The energy storage properties of 0.8SPT-0.2BMZ ceramic exhibit good temperature stability (25−130 °C) and frequency stability (2−80 Hz). In a practical charge-discharge circuit testing, a short discharge pulse-period about 94 ns, a high discharge energy density of 1.7 J/cm³ and an ultra-high-power density of 62.8 MW/cm³ are obtained for the 0.8SPT-0.2BMZ ceramic at 240 kV/cm. The results indicate that the 0.8SPT-0.2BMZ ceramic is a promising dielectric material for high-power pulse capacitors.

铁电（1-x）Sr _0.875 Pb _0.125 TiO ₃ -xBi（Mg _0.5 Zr _0.5）O ₃通过常规的固态烧结方法合成了具有高放电效率和功率密度的（（1-x）SPT-xBMZ，x = 0-0.2）陶瓷。所制备的（1-x）SPT-xBMZ陶瓷被检测为纯钙钛矿结构和致密的微观结构，并且还观察到典型的弛豫行为和优异的温度稳定性。尽管扩散程度和最大极化之间没有直接关系，但是高扩散程度可以减少剩余极化并显着改善铁电陶瓷的能量存储和释放特性。根据极化电场环路测量，可恢复的储能密度为0.762 J / cm ³在150 kV / cm下x = 0.2时，效率高达96.34％。0.8SPT-0.2BMZ陶瓷的储能性能表现出良好的温度稳定性（25-130°C）和频率稳定性（2-80 Hz）。在实际的充放电电路测试中，对于0.8SPT，获得了约94 ns的短放电脉冲周期，1.7 J / cm ³的高放电能量密度和62.8 MW / cm ³的超高功率密度-0.2BMZ陶瓷，240 kV / cm。结果表明，0.8SPT-0.2BMZ陶瓷是一种有前途的大功率脉冲电容器介电材料。