LiSbO3掺杂对KNN基无铅压电陶瓷结构及压电性能的影响

doi:10.11896/cldb.24110207

材料导报

2025, Vol. 39

Issue (23): 24110207-9 https://doi.org/10.11896/cldb.24110207

无机非金属及其复合材料

LiSbO₃掺杂对KNN基无铅压电陶瓷结构及压电性能的影响

龙海洋^1,†, 王涛^1,†, 曹俊^3,4,*, 李艳辉², 马汝成², 李晓硕¹, 王博超¹, 刘志存¹, 方姣^3,4

1 华北理工大学机械工程学院,河北唐山 063210
2 广东省科学院新材料研究所,粤港现代表面工程技术联合实验室,广东省现代表面工程技术重点实验室,广州 510651
3 湖南大学粤港澳大湾区创新研究院,广州 410082
4 湖南大学生命医学交叉研究院,长沙 410082

Effects of LiSbO₃ Doping on the Structure and Piezoelectric Properties of KNN-based Lead-free Piezoelectric Ceramics

LONG Haiyang^1,†, WANG Tao^1,†, CAO Jun^3,4,*, LI Yanhui², MA Rucheng², LI Xiaoshuo¹,WANG Bochao¹, LIU Zhicun¹, FANG Jiao^3,4

1 College of Mechanical Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China
2 Institute of New Materials, Guangdong Academy of Sciences, Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology, Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Guangzhou 510651, China
3 Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 410082, China
4 School of Biomedical Sciences Hunan University, Changsha 410082, China

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摘要压电陶瓷在高压电性、高功率等场景(如换能器、压电发电机等)中的应用呈增长趋势。为避免压电器件在高温工况下失效,较高的机械品质因数(Mechanical quality factor,Q_m)是必要条件。大量研究工作表明,压电系数与机械品质因数等参数呈现出此消彼长的关系,这使得压电材料在保持高压电系数的同时提高机械品质成为巨大挑战。本工作采用固相烧结法制备了(1-x)(K_0.44Na_0.56Nb_0.98Ta_0.02O₃)-xLiSbO₃(x=0.01、0.02、0.03、0.04)陶瓷,简称(KNNT-LS)。结果表明,加入适量的LiSbO₃可以形成R-O(低温)、O-T(室温)相边界,相结构转变温度趋近于室温,从而可以构建R-O-T共存相,这有利于协同调制提高压电性能,扩大高功率压电器件的工作温度范围。第二相晶粒增多及氧空位的出现强化了钉扎效应,提高了陶瓷的Q_m值。在x=0.02(d₃₃=248 pC/N、T_C=379 ℃、Q_m=145、ε_r=33 650(1 kHz、379 ℃))时陶瓷性能达到最优。此外,通过调控掺杂组分与氧空位的含量,机械品质因数(Q_m)获得了显著改善。本研究有助于理解该体系掺杂组分引起的多相共存的本质以及氧空位对压电性能的影响,在大功率器件领域具有广阔应用潜力。

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	龙海洋
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	李艳辉
	马汝成
	李晓硕
	王博超
	刘志存
	方姣

关键词: 铌酸钾钠基无铅压电陶瓷相变微观结构氧空位机械品质因数

Abstract: Piezoelectric ceramics are showing a growing trend in applications with high piezoelectric coefficients and high power, such as transducers and piezoelectric generators. To prevent the piezoelectric devices from failing at high temperature conditions, a higher mechanical quality factor (Q_m) value is necessary. Extensive research has shown that parameters such as piezoelectric coefficients and mechanical quality factor exhibit a trade-off relationship, making it a significant challenge to improve the mechanical quality while maintaining a high piezoelectric coefficient in piezoelectric materials. This work uses solid-state sintering method to prepare (1-x) (K_0.44Na_0.56Nb_0.98Ta_0.02O₃)-xLiSbO₃ (x=0.01, 0.02, 0.03, 0.04) ceramics, abbreviated as KNNT-LS. The results showed that adding an appropriate amount of LiSbO₃ can form R-O phase boundaries at low temperature and O-T phase boundaries at room temperature, and the phase structure transition temperature is close to room temperature, constructing R-T coexisting phases. This is beneficial for synergistic modulation to improve piezoelectric performance and expand its working temperature range, the increase of second-phase grains and the emergence of oxygen vacancies have intensified the pinning effect, enhancing the Q_m value of the ceramic. The performance reaches its optimal level at x=0.02 (d₃₃=248 pC/N, T_C=379 ℃, Q_m=145, ε_r=33 650 (1 kHz, 379 ℃)). In addition, the mechanical quality factor (Q_m) has been significantly improved by the regulation of doping components and oxygen vacancies. The findings are helpful to understand the nature of multiphase coexistence caused by doping components in this system and the inf-luence of oxygen vacancies on piezoelectric properties, which has broad applications in high-power devices.

Key words: potassium sodium niobate(KNN) lead-free piezoelectric ceramics phase transition microstructure oxygen vacancy mechanical quality factor

出版日期: 2025-12-10 发布日期: 2025-12-03

ZTFLH:

TM282

基金资助: 湖南省重大科技专项资助项目(2021SK1020);广东省科学院“百人计划”引进专项(2021GDASYL-20210102005);广东省科技计划项目资助(2023B1212120008;2023B1212060045);广东省科学院科技合作平台建设资金(2022GDASZH-2022010203-003);广州市“青年科技人才托举工程(QT-2023-038);河北省在读研究生创新能力培养资助项目(CXZZBS2024136);河北省省属高校基本科研业务费项目(JQN2023029)

通讯作者: ^*曹俊,博士,湖南大学粤港澳大湾区创新研究院功能材料器件研发中心主任、硕士研究生导师。目前主要从事功能材料、功能器件等方面的研究。caojun10@126.com

作者简介: ^†共同第一作者龙海洋,华北理工大学副教授、硕士研究生导师。主要从事激光增材制造、机械动力学、数字化设计方面等方面的研究工作。王涛,华北理工大学机械工程学院硕士研究生,在曹俊教授的指导下进行研究。目前主要研究领域为功能材料。

引用本文:

龙海洋, 王涛, 曹俊, 李艳辉, 马汝成, 李晓硕, 王博超, 刘志存, 方姣. LiSbO₃掺杂对KNN基无铅压电陶瓷结构及压电性能的影响[J]. 材料导报, 2025, 39(23): 24110207-9.
LONG Haiyang, WANG Tao, CAO Jun, LI Yanhui, MA Rucheng, LI Xiaoshuo,WANG Bochao, LIU Zhicun, FANG Jiao. Effects of LiSbO₃ Doping on the Structure and Piezoelectric Properties of KNN-based Lead-free Piezoelectric Ceramics. Materials Reports, 2025, 39(23): 24110207-9.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.24110207 或 https://www.mater-rep.com/CN/Y2025/V39/I23/24110207

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