第三种成分在bifeo3 - batio3基三元压电陶瓷中的作用及其a位阳离子离心机理

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-03-13 DOI:10.1016/j.scriptamat.2025.116637

Hyunwook Nam , Sangwook Kim , Ichiro Fujii , Motoki Aruga , Shintaro Ueno , Yoshihiro Kuroiwa , Satoshi Wada

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引用次数: 0

摘要

与二元BFBT陶瓷相比，三元BiFeO3-BaTiO3 （BFBT）基陶瓷通常表现出更高的压电性。然而，三元陶瓷中压电性增强的来源仍不清楚。在本研究中，我们利用高能同步辐射x射线衍射和Rietveld方法检测了Bi(Mg0.5Ti0.5)O3 （BMT）改性BFBT压电陶瓷的伪立方对称性，研究了第三种成分的作用。我们的实验结果验证了Bi离子偏心位移的关键影响，因为在特定的第三组分中，最大的Bi离子偏心位移表现出最高的压电性能。Bi离子的位移随Bi- o共价键长度和偏离中心的Bi与b位阳离子之间的排斥作用而变化。本研究强调了高性能bfbt基压电陶瓷中第三种组合物中b位阳离子离子半径的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Role of the third composition and its A-site cation off-centering mechanism in ternary BiFeO3‒BaTiO3-based piezoelectric ceramics

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Role of the third composition and its A-site cation off-centering mechanism in ternary BiFeO3‒BaTiO3-based piezoelectric ceramics

Ternary BiFeO₃‒BaTiO₃ (BFBT)-based ceramics often exhibit a higher piezoelectricity compared to binary BFBT ceramics. However, the origin of the enhanced piezoelectricity in ternary ceramics remains unclear. In this study, we investigated the role of the third composition by examining the pseudo-cubic symmetry of Bi(Mg_0.5Ti_0.5)O₃ (BMT)-modified BFBT piezoelectric ceramics using high-energy synchrotron radiation X-ray diffraction and the Rietveld method. Our experimental results validate the critical influence of Bi ion off-centering displacement, as the largest Bi ion off-centering displacement at a specific third composition demonstrates the highest piezoelectric properties. The displacement of Bi ions varies with the Bi-O covalent bond length and repulsive interactions between the off-centered Bi and B-site cations. This study highlights the importance of the ionic radii of the B-site cations in the third composition for high-performance BFBT-based piezoelectric ceramics.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.