基于缺陷复合物设计的W-Mg共掺杂na0.5 bi0.5 tio3基陶瓷的大电致伸缩响应

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-05-06 DOI:10.1016/j.jallcom.2025.180802

Menglu Li , Weili Li , Wenping Cao , Nuo Xu , Wenqi Li , Weidong Fei

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引用次数: 0

摘要

基于钛酸铋钠（Bi0.5Na0.5TiO3， BNT）的无铅电致伸缩器对于可持续执行器技术至关重要，但其性能限制需要创新的缺陷工程策略。在这里，我们报告了一种协同的b位点供体-受体共掺杂方法，通过定制缺陷复合物来放大电致伸缩响应。通过加入W6+-Mg2+共掺杂，产生静电场、应力场和电负性差，促进了畴切换，限制了b位离子。在此基础上，我们证明了电致伸缩系数在0.1 Hz时为0.0543 m4/C2，在100 Hz时稳定在~0.037 m4/C2左右。这项工作建立了一个通用的共掺杂范例来优化无铅电致伸缩器，将原子尺度的缺陷控制与宏观机电性能联系起来。

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Large electrostrictive response in W-Mg co-doped Na0.5Bi0.5TiO3-based ceramics via defect complex designing

Lead-free electrostrictors based on bismuth sodium titanate (Bi_0.5Na_0.5TiO₃, BNT) are critical for sustainable actuator technologies, yet their performance limitations necessitate innovative defect engineering strategies. Here, we report a synergistic B-site donor-acceptor co-doping approach to amplify the electrostrictive response via tailored defect complex. By incorporating W^6 +-Mg²⁺ co-doping, which results in electrostatic field, stress field and electronegativity difference, the domain switching is promoted and the B-site ions are limited. On this basis, we demonstrate the electrostrictive coefficient of 0.0543 m⁴/C² at 0.1 Hz and stable around ∼0.037 m⁴/C² at 100 Hz. This work establishes a universal co-doping paradigm to optimize lead-free electrostrictors, bridging atomic-scale defect control to macroscopic electromechanical performance.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.