High energy density and efficiency in (Pb,La)(Zr,Sn,Ti)O-3 antiferroelectric ceramics with high La3 content and optimized Sn4 content
High energy density and efficiency in (Pb,La)(Zr,Sn,Ti)O-3 antiferroelectric ceramics with high La3 content and optimized Sn4 content
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具有高 La3 含量和优化 Sn4 含量的 (Pb,La)(Zr,Sn,Ti)O-3 反铁电陶瓷具有高能量密度和效率
DOI：
10.1016/j.ceramint.2019.08.164
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发表时间：
2019
影响因子：
5.2
通讯作者：
He Yunbin
中科院分区：
文献类型：
--
作者：
Yua Yuxi;Zhang Yangyang;Zou Kailun;Chen Guang;Zhang Ying;Li Hao;Lu Yinmei;Zhang Qingfeng;He Yunbin
为了在一种材料中同时获得高可回收能量密度（Wre）和效率（η），我们研究了Sn4+含量对高La3+含量（Pb0.955La0.03）（Zr0.50SnxTi0.50-x） o3反铁电（AFE）陶瓷储能容量的影响。因此，La3+可以使极化电场（P-E）环路缩小，从而产生良好的储能性能。由于离子半径较大的Sn4+取代了Ti4+，使得容差系数减小，从而提高了AFE相的稳定性。这种修正导致了铁电-反铁电相开关电场（EA）的增强，有利于wre的增加。但同时，随着Sn4+含量的增加，最大极化减小，导致wre的劣化。结果表明，（Pb0.955La0.03）（Zr0.50Sn0.42Ti0.08）O3AFE陶瓷具有较高的wre（3.99 J/cm3）和η(79.2%)，具有最佳的储能性能。此外，wreandη在25 ~ 125 °C范围内表现出良好的温度稳定性。这些结果表明，这种陶瓷可以用来制备在不同环境下工作的介质电容器。
In this work, to simultaneously obtain a high recoverable energy density (Wre) and efficiency (η) in one kind of material, we investigate the effects of Sn4+content on the energy storage capacity of (Pb0.955La0.03)(Zr0.50SnxTi0.50-x)O3antiferroelectric (AFE) ceramics with a high La3+content. La3+can cause polarization-electric field (P-E) loops to narrow down, therefore, resulting in a good energy storage performance. On account of the replacement of Sn4+with larger ion radius for Ti4+, the tolerance factor decreases, and therefore, the AFE phase stability improves. This modification results in an enhancement of the ferroelectric-antiferroelectric phase switching electric field (EA), which favours an increase inWre. However, at the same time, with the increase of Sn4+content, the maximum polarization decreases, which can lead to a deterioration inWre. As a result, the optimal energy storage performance is achieved in the (Pb0.955La0.03)(Zr0.50Sn0.42Ti0.08)O3AFE ceramic, which possesses a highWre(3.99 J/cm3) andη(79.2%). Additionally, theWreandηexhibit a good temperature stability from 25 to 125 °C. These results indicate that this kind of ceramic can be used to prepare dielectric capacitors for working in different environments.