<strong>BNZ</strong>组分对<strong>KNN</strong>基无铅压电陶瓷结构和性能的影响

doi:10.11901/1005.3093.2022.647

材料研究学报

2024, Vol. 38

Issue (1): 51-60 DOI: 10.11901/1005.3093.2022.647

研究论文

本期目录 | 过刊浏览

BNZ组分对KNN基无铅压电陶瓷结构和性能的影响

李博森, 廖忠新, 高大强(

)

兰州大学物理科学与技术学院兰州 730030

Effect of BNZ Component on Structure and Property of KNN Based Lead-free Piezoelectric Ceramics

LI Bosen, LIAO Zhongxin, GAO Daqiang(

)

School of Physical Science and Technology, Lanzhou University, Lanzhou 730030, China

引用本文:

李博森, 廖忠新, 高大强. BNZ组分对KNN基无铅压电陶瓷结构和性能的影响[J]. 材料研究学报, 2024, 38(1): 51-60.
Bosen LI, Zhongxin LIAO, Daqiang GAO. Effect of BNZ Component on Structure and Property of KNN Based Lead-free Piezoelectric Ceramics[J]. Chinese Journal of Materials Research, 2024, 38(1): 51-60.

全文: PDF(9143 KB) HTML

摘要:

制备铌酸钾钠-锆酸铋钠(1-x)K_0.48Na_0.52Nb_0.96Sb_0.04O₃-x(Bi_0.5Na_0.5)ZrO₃二元系无铅压电陶瓷并表征其结构和性能，研究了BNZ组分对其结构和性能的影响。结果表明，这种系列压电陶瓷具有典型的钙钛矿结构。x =0.04的这种陶瓷最为致密，其相对密度为97.43%；压电性能最优：d₃₃ = 463 pC/N、k_p = 0.55、Q_m = 37。这种陶瓷材料在室温下处于三方-四方(R-T)两相共存状态并具有纳米畴结构，使其压电性能优异。

关键词 ：无机非金属材料, 压电陶瓷, 铌酸钾钠, 纳米畴, 温度稳定性

Abstract：

In order to promote the practical application of lead-free piezoelectric ceramics, in this paper, a kind of sodium potassium niobate-sodium bismuth zirconate (1-x)K_0.48Na_0.52Nb_0.96Sb_0.04O₃-x(Bi_0.5Na_0.5)ZrO₃ lead-free piezoelectric ceramics were prepared, and their crystallographic structure and performance were assessed. Results show that their relative dielectric constant and the resonant frequency temperature are stable (< 10‰) with the variation of temperature; the piezoelectric ceramics are typical perovskite structure, and the most compact ceramic sample is obtained with x=0.04, which endows RD=97.43%, d₃₃ = 463 pC/N, k_p = 0.55 and Q_m = 37; the piezoelectric ceramics consists of tripartite-tetragonal (R-T) two-phases and the existence of nanodomain structure may be the cause for the excellent piezoelectric properties of ceramic materials.

Key words： inorganic non-metallic materials piezoelectric ceramics potassium sodium niobate nanometer domain temperature stability

收稿日期: 2022-12-07

ZTFLH:

TQ174

基金资助:甘肃省教育科技创新青年博士基金(2022QB-002);兰州大学奥迪威传感器有限公司联合研究院项目

通讯作者: 高大强，教授，gaodq@lzu.edu.cn，研究方向为压电陶瓷、二维磁性材料及电催化

Corresponding author: GAO Daqiang, Tel: 18919960427, E-mail: gaodq@lzu.edu.cn

作者简介: 李博森，男，1998年生，硕士生

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图1 不同BNZ含量的铌酸钾钠-锆酸铋钠无铅压电陶瓷的SEM形貌和晶粒尺寸分布以及平均粒径尺寸

图2 不同BNZ含量的铌酸钾钠-锆酸铋钠无铅压电陶瓷的物性以及与类似体系的陶瓷[32~36]性能的对比

图3 不同x的铌酸钾钠-锆酸铋钠无铅压电陶瓷的室温XRD谱、精修和相比例分布

表1 x = 0~0.06陶瓷样品的晶胞参数以及T相的c/a值

图4 KNNS-xBNZ陶瓷的室温拉曼光谱、各振动模式的拉曼位移、x = 0.04陶瓷的拉曼谱以及x = 0.04陶瓷的ν1和ν2振动模式的拟合线

图5 极化前后不同x的二组分陶瓷的低温区介电温谱、高温区介电温谱以及相变温度变化

图6 不同x陶瓷样品电滞回线全图、Ec、Pmax、Pr随x的变化、d33和εrPr随x的变化以及x = 0.04的陶瓷在-40~100oC以20oC作为对比的相对介电常数εr和串联谐振频率Fs的温度变化率随温度的变化

图7 x = 0.04的陶瓷样品的TEM和SEM形貌

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