{“_”：“优先的B位铁替代使（K，Na）NbO基无铅陶瓷中的缺陷介导晶粒生长和畴工程成为可能。”，“sub”：[“3”]}
{"_":"Preferential B-Site Fe Substitution Enables Defect-Mediated Grain Growth and Domain Engineering in (K, Na)NbO-Based Lead-Free Ceramics.","sub":["3"]}
摘要(中文译文)
(K, Na)NbO₃（KNN）陶瓷作为领先的无铅压电候选材料已被广泛研究，其性能通常通过化学改性进行调控。尽管Fe₂O₃作为烧结助剂已被广泛使用，但Fe离子在KNN晶格中的占位情况仍不明确，其后续影响材料性能的具体物理机制也仍存在争议。本工作采用三种不同的掺杂策略（即A位掺杂、B位掺杂以及作为烧结助剂引入）来研究Fe离子的占位倾向机制。结合实验结果与第一性原理计算，发现Fe离子在KNN基陶瓷中强烈倾向于占据B位。氧空位促进晶粒生长与铁电畴增大的协同效应被认为是压电性能增强的原因。这些发现为Fe离子的占位机制提供了关键见解，为进一步优化KNN基陶瓷的性能提供了详细框架。
Abstract
(K, Na)NbO (KNN) ceramics have been extensively studied as a leading lead-free piezoelectric candidate, with their performance typically tailored through chemical modification. Despite the widespread use of FeO as a sintering aid, the site occupancy of the Fe ions within the KNN lattice remains unclear. The specific physical mechanisms underlying their subsequent impact on material properties are still subjects of debate. In this work, we employed three different doping strategies (i.e., A-site doping, B-site doping, and introduction as a sintering aid) to investigate the occupancy tendency mechanism of the Fe ions. Combined experimental results and first-principles calculations reveal a strong preference for Fe ions to occupy the B site in KNN-based ceramics. The synergistic effect of oxygen vacancy-promoted grain growth and enlarged ferroelectric domains is found to be responsible for the enhanced piezoelectric performance. These findings provide critical insights into the site occupancy mechanisms of Fe ions, offering a detailed framework for further performance optimization in KNN-based ceramics.
如何引用
AMA
Ying Tang, Jinxuan Ren, Diyan Yang, Zhi Tan, Yinchang Ma, Tao Yang, et al. {"_":"Preferential B-Site Fe Substitution Enables Defect-Mediated Grain Growth and Domain Engineering in (K, Na)NbO-Based Lead-Free Ceramics.","sub":["3"]}. ACS applied materials & interfaces. 2026; doi:10.1021/acsami.6c08576.
APA
Ying Tang, Jinxuan Ren, Diyan Yang, Zhi Tan, Yinchang Ma, Tao Yang, et al (2026). {"_":"Preferential B-Site Fe Substitution Enables Defect-Mediated Grain Growth and Domain Engineering in (K, Na)NbO-Based Lead-Free Ceramics.","sub":["3"]}. ACS applied materials & interfaces. https://doi.org/10.1021/acsami.6c08576
GB/T 7714
Ying Tang, Jinxuan Ren, Diyan Yang, Zhi Tan, Yinchang Ma, Tao Yang, et al. {"_":"Preferential B-Site Fe Substitution Enables Defect-Mediated Grain Growth and Domain Engineering in (K, Na)NbO-Based Lead-Free Ceramics.","sub":["3"]}[J]. ACS applied materials & interfaces, 2026 doi:10.1021/acsami.6c08576.
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