Giant electrostrain accompanying structural evolution in lead-free NBT-based piezoceramics
Giant electrostrain accompanying structural evolution in lead-free NBT-based piezoceramics
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无铅 NBT 压电陶瓷中伴随结构演化的巨大静电应变
DOI：
10.1039/c7tc05359b
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发表时间：
2018-01
影响因子：
6.4
通讯作者：
Yan Haixue
中科院分区：
文献类型：
--
作者：
Liu Xing;Xue Saidong;Li Feng;Ma Jinpeng;Zhai Jiwei;Shen Bo;Wang Feifei;Zhao Xiangyong;Yan Haixue
高性能的（Na0.5Bi0.5）TiO 3（NBT）无铅陶瓷是一种很有前途的压电陶瓷材料，但其高驱动力限制了其实际应用。本文报道了一种新型三元（0.94 − x）（Na0.5Bi0.5）TiO 3 -0.06Ba（Zr0.05Ti0.95）O3−x（Sr0.8Bi0.1□0.1）TiO2.95固溶体（x = 0.05（SBT 5））在4 kV mm−1的低驱动场下的巨大压电应变（d33*）为810 pm V−1。与其它NBT基陶瓷相比，SBT 5陶瓷的临界成分范围明显减小，而其应变性能沿着保持在较高水平，并具有优异的热稳定性。掺杂诱导了一个随机分布的局部极化场，这打破了朗道电位曲线的对称性，增强了铁电不稳定性，有利于更无序的弛豫结构。临界组分SBT 5中的巨大应变是由于场诱导的可逆弛豫-铁电相变，而降低的驱动场是由两种协同效应引起的：作为极性畴生长的种子的弛豫准铁电有序有助于系统跳过成核过程;局部缺陷进一步促进铁电畴的生长。从微观和宏观两个方面系统地阐述了结构演化的成分、温度和电场依赖性。该研究为实现无铅驱动器材料的巨电应变提供了一条可行而有效的途径。
High-performance (Na0.5Bi0.5)TiO3 (NBT) lead-free incipient ceramics are promising piezoactuator materials, but high driving fields to deliver the large strain limits their practical applications. Herein, we report a giant piezoelectric strain (d33*) of 810 pm V−1 at a low driving field of 4 kV mm−1 in a novel ternary (0.94 − x)(Na0.5Bi0.5)TiO3–0.06Ba(Zr0.05Ti0.95)O3−x(Sr0.8Bi0.1□0.1)TiO2.95 solid solution with x = 0.05 (SBT5). The field of SBT5 critical composition is notably reduced compared with other NBT-based ceramics, while its strain properties are maintained at a high level along with an excellent thermal stability. The dopant induces a randomly distributed local polarization field, which breaks the symmetry of Landau potential curves, boosts the ferroelectric instability and favors a more disordered relaxor structure. The giant strain in the critical composition SBT5 is due to a field-induced reversible relaxor-ferroelectric phase transformation, while the reduced driving field results from two synergistic effects: remanent quasi-ferroelectric order as the seed for the growth of polar domains helps the system skip the nucleation process; the local defects further facilitate the growth of ferroelectric domains. The composition, temperature and electric-field dependence of structural evolutions were systematically elucidated from the micro- and macroscopic view. This study opens up a feasible and effective way for achieving giant electrostrain in lead-free actuator materials.
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影响因子：
3.2
作者：
D. Viehland;Jiefang Li
通讯作者：
D. Viehland;Jiefang Li
Bi(Ni1/12Ti1/2)O-3-PbTiO3-Pb(Mg1/3Nb2/3)O-3三元体系中接近同形相界的弛豫-正态铁电相变和显着增强的机电应变行为
影响因子：
5.7
作者：
Zheng Donggeng;Zuo Ruzhong
通讯作者：
Zuo Ruzhong
影响因子：
5.7
作者：
Wanli Zhao;R. Zuo;Fu Jian
通讯作者：
Wanli Zhao;R. Zuo;Fu Jian
影响因子：
3.7
作者：
Hanzheng Guo;Xiaomin Liu;F. Xue;Long-Qing Chen;Wei Hong;X. Tan
通讯作者：
Hanzheng Guo;Xiaomin Liu;F. Xue;Long-Qing Chen;Wei Hong;X. Tan
DOI：
10.1088/0953-8984/25/43/435901
发表时间：
2013-10
期刊：
Journal of Physics: Condensed Matter
影响因子：
--
作者：
Yumei Zhou;D. Xue;Xiangdong Ding;Lixue Zhang;Jun Sun;X. Ren
通讯作者：
Yumei Zhou;D. Xue;Xiangdong Ding;Lixue Zhang;Jun Sun;X. Ren