Abstract Relaxor ferroelectrics are attracting an increasing interest in the application of pulse power systems due to their excellent energy storage performance. In this paper, the (1-x)(Ba0·85Ca0.15)(Zr0·1Ti0.9)O3-xBi(Mg0·5Ti0.5)O3 ((1-x)BCZT-xBMT, x ≤ 0.2) relaxor ceramics are prepared by the solid state method. The influence of BMT on the microstructure, dielectric and energy storage properties of the prepared ceramics is investigated. The XRD results show that the peak intensity of impurities (Bi2O3, TiO2 and Ba2Bi4Ti5O18) is gradually stronger than that of BCZT phase with x increasing. Meanwhile, the grain size of (1-x)BCZT-xBMT ceramics gradually increases on account of the appearance of impurities Bi2O3. Influenced by the impurities and BMT, the dielectric constant of prepared ceramics gradually decreases with x increasing. A large Wrec value of 0.65 J/cm3 with an ultrahigh η value of 97.89% is achieved at x = 0.15 due to the high breakdown strength and slim P-E hysteresis loop. Meanwhile, the η is insensitive to the electric field. The ultrahigh η leads to lesser energy loss during the charge and discharge process. It makes the 0.85BCZT-0.15BMT ceramic more attractive in the application of pulse power systems.

中文翻译：

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(1-x)(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3-xBi(Mg0.5Ti0.5)O3陶瓷的超高和场独立储能效率

摘要 弛豫铁电体由于其优异的储能性能，在脉冲电源系统的应用中越来越受到关注。在本文中，(1-x)(Ba0·85Ca0.15)(Zr0·1Ti0.9)O3-xBi(Mg0·5Ti0.5)O3 ((1-x)BCZT-xBMT, x ≤ 0.2)弛豫陶瓷是通过固态方法制备的。研究了 BMT 对制备的陶瓷的微观结构、介电和储能性能的影响。XRD结果表明，随着x的增加，杂质(Bi2O3、TiO2和Ba2Bi4Ti5O18)的峰强度逐渐强于BCZT相。同时，由于杂质 Bi2O3 的出现，(1-x)BCZT-xBMT 陶瓷的晶粒尺寸逐渐增大。受杂质和BMT的影响，制备的陶瓷的介电常数随着x的增加而逐渐降低。由于高击穿强度和细长的 PE 磁滞回线，在 x = 0.15 处实现了 0.65 J/cm3 的大 Wrec 值和 97.89% 的超高 η 值。同时，η对电场不敏感。超高的 η 导致充放电过程中的能量损失较小。它使 0.85BCZT-0.15BMT 陶瓷在脉冲电源系统的应用中更具吸引力。