Effects of sintering method on the structural, dielectric and energy storage properties of AgNbO3 lead-free antiferroelectric ceramics
Effects of sintering method on the structural, dielectric and energy storage properties of AgNbO3 lead-free antiferroelectric ceramics
复制标题
烧结方法对AgNbO3无铅反铁电陶瓷结构、介电和储能性能的影响
DOI：
10.1007/s10853-021-06148-x
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发表时间：
2021-05-18
影响因子：
4.5
通讯作者：
Wang, Chunchang
中科院分区：
文献类型：
--
作者：
Li, Tianyu;Cao, Wenjun;Wang, Chunchang
在这项工作中，我们系统地研究了单步和两步烧结方法对纯AgNbO 3无铅反铁电陶瓷的结构，介电和储能性能的影响。与一步烧结法相比，二步烧结法制备的陶瓷晶粒尺寸更小，显微结构致密均匀。此外，介电温度谱的结果表明，两步烧结法几乎没有改变AgNbO 3陶瓷的相变温度，但大大降低了介电损耗值。最重要的是，两步烧结法制备的陶瓷具有较高的击穿电场强度（22 kV/mm）、较大的可恢复储能密度-W-rec（2.59 J/cm（3））和储能效率-eta（45%）以及优异的温度稳定性。此外，它还表现出高功率密度（P-D = 25.7 MW/cm（3））和极快的充放电速度（25 ns）。我们的研究结果为设计高性能AgNbO 3基储能无铅陶瓷提供了一种简单而新颖的方法。
In this work, we systematically investigated the effects of single-step and two-step sintering methods on the structural, dielectric and energy storage properties of pure AgNbO3 lead-free antiferroelectric ceramics. Compared with the single-step sintered ceramic, the ceramic prepared by two-step sintering method has smaller grain size, dense and homogeneous microstructure. In addition, the results of dielectric temperature spectra reveal that the two-step sintering method hardly changes the phase transition temperature of AgNbO3 ceramics but greatly decreases the dielectric loss value. Most importantly, the ceramic prepared by the two-step sintering method displays high breakdown electric field strength (22 kV/mm), larger recoverable energy storage density-W-rec (2.59 J/cm(3)) and higher energy storage efficiency-eta (45%) as well as excellent temperature stability than those of the ceramic by single-step sintering method. Furthermore, it also exhibited high power density (P-D = 25.7 MW/cm(3)) and extremely fast charge-discharge speed (25 ns). Our results provide a simple and novel way to design high-performance AgNbO3-based energy storage lead-free ceramics.