当前位置: X-MOL 学术J. Materiomics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Scaling behavior of different shapes of hysteresis loops and recoverable energy storage density in Na0.5Bi0.5TiO3, K0.5Bi0.5TiO3, and Na0.25K0.25Bi0.5TiO3 ferroelectrics
Journal of Materiomics ( IF 8.4 ) Pub Date : 2021-12-28 , DOI: 10.1016/j.jmat.2021.12.007
Krishnarjun Banerjee 1 , Saket Asthana 1
Affiliation  

In this work, the dependency of the polarization (P) - electric field (E) loop area A of lead free ferroelectrics Na0.5Bi0.5TiO3 (NBT), K0.5Bi0.5TiO3 (KBT), and Na0.25K0.25Bi0.5TiO3 (NKBT) on the amplitude (E0) of the electric field is studied. Based on the nature of the hysteresis loop with increasing E0, the lnA versus lnE0 graph is divided into three stages and the scaling exponents of each stage are estimated. In the third stage, NBT, KBT, and NKBT show different shapes of P-E loops (square, slanted and pinched, respectively). Although, almost similar slopes in the third stage are obtained from the lnA versus lnE0 graphs of KBT and NKBT, the formation of pinched P-E loop of NKBT is discussed based on the current-time curve under a complete cycle of the applied electric field. The shape of the P-E loop also affects the recoverable energy storage density (Wrec) of the material. Similar to the scaling of A, the variation of lnWrec with lnE0 of NBT, KBT and NKBT are examined. Interestingly, three stages are only noticed in the lnWrec lnE0 curve of pinched P-E loop (NKBT), whereas lnWrec linearly increases with lnE0 for square and slanted P-E loop. Such type of behavior of Wrec of NKBT is explained based on the reversible domain switching mechanism of the pinched P-E loop.



中文翻译:

Na0.5Bi0.5TiO3、K0.5Bi0.5TiO3和Na0.25K0.25Bi0.5TiO3铁电体中不同形状磁滞回线的缩放行为和可恢复的储能密度

在这项工作中,极化 (P) - 电场 (E) 环路面积的依赖性一个在振幅( _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _0) 的电场进行了研究。基于磁滞回线的性质,随着增加0, 这ln一个相对ln0图分为三个阶段,并估计每个阶段的缩放指数。在第三阶段,NBT、KBT 和 NKBT 显示出不同形状的 PE 环(分别为方形、倾斜和捏合)。虽然,第三阶段几乎相似的斜率是从ln一个相对ln0在KBT和NKBT的曲线图上,根据施加电场的一个完整周期下的电流-时间曲线,讨论了NKBT的收缩PE环的形成。PE回路的形状也会影响可恢复的储能密度(WreC) 的材料。类似于缩放一个, 的变化lnWreCln0对 NBT、KBT 和 NKBT 进行检查。有趣的是,三个阶段只在lnWreC- ln0收缩 PE 环 (NKBT) 的曲线,而lnWreC随着线性增加ln0用于方形和倾斜 PE 环。这种类型的行为WreCNKBT 的解释基于收缩 PE 环路的可逆域切换机制。

更新日期:2021-12-28
down
wechat
bug