The effect of the bipolar field on the aging behavior and the associated properties of the Mn-doped BaTiO3 ceramics
The effect of the bipolar field on the aging behavior and the associated properties of the Mn-doped BaTiO3 ceramics
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DOI：
10.1016/j.jallcom.2014.08.211
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发表时间：
2015-01
影响因子：
6.2
通讯作者：
Xia Zhao;Wei Chen;Lixue Zhang;L. Zhong
中科院分区：
文献类型：
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作者：
Xia Zhao;Wei Chen;Lixue Zhang;L. Zhong
研究了典型的双极性电场对Mn掺杂BaTiO 3陶瓷时效行为的影响。结果表明，在时效过程的不同阶段施加双极性预电场，其作用效果有明显的不同：对于未时效样品，100 ms的双极性预电场有助于形成位移磁滞回线，其d33值高达170 pC/N，约为1.0 kV/mm直流极化30 min样品d33值的65%;更重要的是，它有助于短时间老化10小时的样品形成良好收缩的磁滞回线和在3.0 kV/mm电场下接近0.23%的大的可恢复电应变，这比在相同测试条件下老化3天的样品大约20%。当样品老化3天后，预磁场仅表现出去老化效应，其释放了收缩的磁滞回线。上述结果表明，预加载双极场加速老化过程和提高相关性能的可能途径。从预加载双极场对缺陷再分布的影响以及不同时效阶段畴结构稳定性的角度，对微观理解进行了讨论。
In this work, the influence of the typical bipolar electric field on the aging behavior, rather than the normally time evolution aging, of the Mn-doped BaTiO3ceramics and the associated properties were studied. Our results show the obviously different influences of the bipolar filed when applied in the different periods of the time-aged process: for an unaged sample, a 100 ms bipolar pre-field assists to develop a displaced hysteresis loop and a highd33of 170 pC/N which is nearly 65%d33of the sample with the dc poling in the same electric amplitude of 1.0 kV/mm for 30 min; more importantly, it assists the sample shortly aged 10 h to develop a well-constricted hysteresis loop and a large recoverable electro-strain of nearly 0.23% under 3.0 kV/mm field, which is about 20% larger strain than the sample aged 3 days under the same test condition. Contrarily, when the sample well aged 3 days, the pre-field shows only the de-aging effect, it released the constricted hysteresis loop. The above results thus indicate a possible way to accelerate aging process and enhance the associated properties by pre-load bipolar field. A microscopic understanding was discussed from the viewpoint of the influence of a pre-load bipolar field on the redistribution of the defects and thus the stabilization of domain configuration in different aging periods.