Role of ZnO dopant in enhancing piezoelectric characteristics in KNN-based piezoelectric ceramics

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-10-08 DOI:10.1111/jace.20186

Yilong Liu, Chuilei Wang, Yuanna Zhu, Limin Hou, Tao Wei, Tongzhen Wu, Yu Huan

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引用次数: 0

Abstract

Considering that lead-based piezoelectric ceramics are not conducive to sustainable development, the research and preparation of environmentally friendly lead-free piezoelectric ceramics has become a new trend. Among them, potassium-sodium niobate based (KNN-based) piezoelectric ceramics are considered as the most potential candidates because of their good piezoelectric properties. However, the strong sensitivity to temperature has hindered the further application of KNN-based ceramics. In this work, the ZnO dopant was introduced in 0.96K_0.48Na_0.52Nb_0.96Sb_0.04O₃–0.04Bi_0.5Na_0.5HfO₃ ceramics to improve their piezoelectric characteristics. On the one hand, Zn²⁺ could occupy B-site and thus enhance the lattice distortion of BO₆ octahedra, resulting the enhanced piezoelectric properties including k_p = 46%, d₃₃ = 344 pC/N and T_C = 282°C in the optimal component with x = 0.01. On the other hand, the defect dipole formed by the acceptor dopant Zn²⁺ pinned the motion of domain wall, and thus improved the temperature stability over a wide temperature range of 20°C to 180°C, where the descent in unipolar strain decreased from 35% (x = 0) to 23% (x = 0.01). This work provides a point of view about how ZnO dopants make an influence on the KNN-based ceramics.

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ZnO掺杂剂在提高knn基压电陶瓷压电特性中的作用

考虑到铅基压电陶瓷不利于可持续发展，环境友好型无铅压电陶瓷的研究和制备已成为一个新的趋势。其中，铌酸钾-钠基（KNN-based）压电陶瓷因其良好的压电性能被认为是最有潜力的候选材料。然而，knn基陶瓷对温度的强烈敏感性阻碍了其进一步的应用。在0.96 k0.48 na0.52 nb0.96 sb0.040 o3 - 0.04 bi0.5 na0.5 hfo3陶瓷中引入ZnO掺杂剂，改善陶瓷的压电特性。一方面，Zn2+可以占据b位，从而增强BO6八面体的晶格畸变，使得在x = 0.01的最优组分中，kp = 46%, d33 = 344 pC/N, TC = 282°C的压电性能得到提高。另一方面，由受体掺杂剂Zn2+形成的缺陷偶极子抑制了畴壁的运动，从而提高了温度稳定性，在20 ~ 180℃的宽温度范围内，单极应变下降从35% （x = 0）下降到23% （x = 0.01）。这项工作为ZnO掺杂剂如何影响knn基陶瓷提供了一种观点。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.