Exciting low-field dielectric tunability in clamshell

Exciting low-field dielectric tunability in clamshell
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翻盖式令人兴奋的低场介电可调性

DOI:
10.1016/j.jeurceramsoc.2018.07.045
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发表时间:
2018-12
影响因子:
5.7
通讯作者:
Wang Chun Chang
Wang Chun Chang
中科院分区:
材料科学1区
文献类型:
--
作者:
Cheng Chao;Zhuang Yong Long;Lv Ping;Yu Yi;Sun Jie;Wang Shu Ting;Wang Chun Chang

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研究了蛤壳珠光部​​分的介电性能和介电可调性。微观结构表征表明,样品显示出由文石 CaCO3 区域和双大分子区域组成的“砖块和灰浆”结构,这些区域被过渡区域分隔开,过渡区域由被非晶区域包围的结晶颗粒组成。观察到类似铁电体的介电可调性行为,并且在 400°C 和 500Hz 的 34V/cm 小磁场增量下实现了 79% 的令人兴奋的介电可调性。如此低的场尺度,电介质可调谐性接近 80%,可与所有已知的可调谐电介质相媲美。蛤壳多层结构中氧空位的热激活和电激活跳跃运动导致令人兴奋的低场介电可调性。我们的研究结果极大地扩展了介电可调材料的范围,并提供了一种在生物多层材料中实现卓越介电可调性的简便方法。
The dielectric properties and dielectric tunability of the nacreous part of the clamshell were investigated. Microstructure characterizations reveal that the sample shows a “brick-and-mortar” structure composed of aragonitic CaCO3regions and bimacromolecule regions separated by transition regions consisting of crystalline particles surrounded by amorphous area. A ferroelectric-like dielectric tunability behavior was observed and an exciting dielectric tunability of 79% was achieved at 400 °C and 500 Hz within a small field increment of 34 V/cm. Such a low field scale for dielectric tunability near 80% rivals all known tunable dielectrics. Both thermally and electrically activated hopping motion of oxygen vacancies in the multilayered structures of the clamshell leads to the exciting low-field dielectric tunability. Our results dramatically expand the dielectric tunable materials and offer a facile way to achieve superior dielectric tunability in bio-multilayered materials.
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