Given superior breakdown strength than ferroelectrics, linear dielectrics have garnered plenty of attention, yet their low polarization restricts practicability at low electric fields. Hence, a strategic approach for optimizing the energy storage performance of CaSrTiO ceramics by selecting 0.75 KBiTiO-0.25BiFeO as a modulating element to establish relaxor ferroelectrics is put forward in this study. Owing to the incorporation of 0.75 KBiTiO-0.25BiFeO with high polarization, the issue of low polarization in CaSrTiO linear ceramics is overcame. (1-)CaSrTiO-(0.75 KBiTiO-0.25BiFeO) (CST-(KBT-BF)) ceramics reveal a conversion from linear dielectrics to relaxor ferroelectrics, accompanied by a high polarization (＞45 μC/cm) and recoverable energy density of 3.11 J/cm under 180 kV/cm, along with remarkable frequency and temperature stability. Simultaneously, the stepped-up relaxor behavior and refined grain size conduce to improve the energy storage performance. CST-0.5(KBT-BF) ceramics exhibit likewise a commendable discharge power density of 18.7 MW/cm and an ultra-short discharge time of 46.7 ns at 80 kV/cm. This work set up a conspicuous paradigm to promote the innovation-driven development of advanced energy storage capacitors at low electric fields.

中文翻译：

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通过建立弛豫铁电体优化 Ca0.5Sr0.5TiO3 基线性陶瓷低电场储能性能


由于具有比铁电体更高的击穿强度，线性电介质引起了广泛的关注，但其低极化限制了低电场下的实用性。因此，本研究提出了一种通过选择0.75KBiTiO-0.25BiFeO作为调制元素来建立弛豫铁电体来优化CaSrTiO陶瓷储能性能的策略方法。由于掺入了高极化率的0.75KBiTiO-0.25BiFeO，克服了CaSrTiO线性陶瓷极化率低的问题。 (1-)CaSrTiO-(0.75KBiTiO-0.25BiFeO) (CST-(KBT-BF))陶瓷揭示了从线性电介质到弛豫铁电体的转变，并伴随着高极化（>45 μC/cm）和可恢复能量密度180kV/cm下为3.11J/cm，具有出色的频率和温度稳定性。同时，增强的弛豫行为和细化的晶粒尺寸有助于提高储能性能。 CST-0.5(KBT-BF)陶瓷同样表现出值得称赞的放电功率密度18.7MW/cm和80kV/cm下46.7ns的超短放电时间。该工作为推动低电场先进储能电容器创新驱动发展树立了显着范式。