PT含量变化对PMN-PT单晶的大功率性能影响

doi:10.15541/jim20240469

无机材料学报 ›› 2025, Vol. 40 ›› Issue (7): 840-846.DOI: 10.15541/jim20240469

• 研究快报 • 上一篇

PT含量变化对PMN-PT单晶的大功率性能影响

王晓波¹(), 朱于良¹, 薛稳超¹, 史汝川¹, 骆柏锋²(), 罗骋韬¹()

1.上海交通大学电子信息与电气工程学院, 上海 200240
2.南方电网数字电网研究院股份有限公司, 广州510000

收稿日期:2024-11-07 修回日期:2024-12-07 出版日期:2025-07-20 网络出版日期:2024-12-16
通讯作者: 罗骋韬, 副教授. E-mail: cluo1989@sjtu.edu.cn;
骆柏锋, 工程师. E-mail: mrlcsg@foxmail.com
作者简介:王晓波(1995-), 男, 博士研究生. E-mail: 022035910015@sjtu.edu.cn

Effect of PbTiO₃ Content Variation on High-power Performance of PMN-PT Single Crystal

WANG Xiaobo¹(), ZHU Yuliang¹, XUE Wenchao¹, SHI Ruchuan¹, LUO Bofeng²(), LUO Chengtao¹()

1. School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2. Southern Power Grid Digital Grid Research Institute Co., Ltd., Guangzhou 510000, China

Received:2024-11-07 Revised:2024-12-07 Published:2025-07-20 Online:2024-12-16
Contact: LUO Chengtao, associate professor. E-mail: cluo1989@sjtu.edu.cn;
LUO Bofeng, engineer. E-mail: mrlcsg@foxmail.com
About author:WANG Xiaobo (1995-), male, PhD candidate. E-mail: 022035910015@sjtu.edu.cn
Supported by:
Research and Development Project on Voltage Sensors by China Southern Power Grid Digital Research Institute(210000KK52220017)

摘要/Abstract

摘要：

PMN-PT(Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃)压电单晶材料因其优异的性能而得到广泛的应用, 不同组分的配比含量会对PMN-PT压电单晶的性能产生较大影响。同时PMN-PT在大功率上的应用快速发展, 材料参数都是在小信号(1 V)下测试完成的, 而不同PT含量对PMN-PT单晶在大功率应用下的性能影响尚不明确。本研究基于恒压法搭建了完整的压电材料大功率测试平台, 对比测试不同PT含量的PMN-PT单晶在大功率电压激励下的性能表现, 以10 mm×3 mm×0.5 mm的PMN-PT单晶为例, 探究材料参数变化。结果显示: 不同PT含量的PMN-PT单晶在大功率激励下的材料参数变化趋势相同, 但变化程度有较大不同。以PT含量为26%(摩尔百分数)的PMN-PT单晶为例, 当功率达到7.90 W时, 压电系数$d_{31}$增加25%, 弹性耦合系数$s_{11}^{E}$增加13%, 机电耦合系数$k_{31}$增加17%, 机械品质因数$Q_{\mathrm{m}}$下降73%。随着PT含量增加, PMN-PT材料更易受温度的影响, 功率耐受性显著降低, 更易达到退极化温度, 导致压电性能消失。基于本工作的研究结果, 可以更好地明确PT含量对PMN-PT单晶在大功率应用下的影响规律, 从而为以PMN-PT为敏感元件的传感器或换能器设计提供可靠的数据支持。

关键词: 压电单晶, PMN-PT, 大功率测试, 恒压法, 材料参数

Abstract:

Lead magnesium niobate-lead titanate (PMN-PT) piezoelectric single crystals are widely utilized due to their outstanding performance, with varying compositions significantly impacting their properties. While application of PMN-PT in high-power settings is rapidly evolving, material parameters are typically tested under low signal conditions (1 V), and effects of different PT (PbTiO₃) contents on the performance of PMN-PT single crystals under high-power conditions remain unclear. This study developed a comprehensive high-power testing platform using the constant voltage method to evaluate performance of PMN-PT single crystals with different PT contents under high-power voltage stimulation. Using crystals sized at 10 mm×3 mm×0.5 mm as an example, this research explored changes in material parameters. The results exhibit that while trend of the parameter changes under high-power excitation was consistent across different PT contents, degree of the change varied significantly. For instance, a PMN-PT single crystal with 26% (in mol) PT content exhibited a 25% increase in the piezoelectric coefficient $d_{31}$, a 13% increase in the elastic compliance coefficient $s_{11}^{E}$, a 17% increase in the electromechanical coupling coefficient $k_{31}$, and a 73% decrease in the mechanical quality factor $Q_{\mathrm{m}}$ when the power reached 7.90 W. As the PT content increased, the PMN-PT materials became more susceptible to temperature influences, significantly reducing the power tolerance and more readily reaching the depolarization temperatures. This led to loss of piezoelectric performance. Based on these findings, a clearer understanding of impact of PT content on performance of PMN-PT single crystals under high-power applications has been established, providing reliable data to support design of sensors or transducers using PMN-PT as the sensitive element.

Key words: piezoelectric single crystal, PMN-PT, high-power testing, constant voltage method, material parameter

中图分类号:

TQ174

王晓波, 朱于良, 薛稳超, 史汝川, 骆柏锋, 罗骋韬. PT含量变化对PMN-PT单晶的大功率性能影响[J]. 无机材料学报, 2025, 40(7): 840-846.

WANG Xiaobo, ZHU Yuliang, XUE Wenchao, SHI Ruchuan, LUO Bofeng, LUO Chengtao. Effect of PbTiO₃ Content Variation on High-power Performance of PMN-PT Single Crystal[J]. Journal of Inorganic Materials, 2025, 40(7): 840-846.

图/表 10

Fig. 1 Constant voltage method test system

Fig. 2 PMN-PT samples and test equipments (a) PMN-PT samples; (b) $d_{33}$ instrument; (c) Impedance analyzer

Table 1 Small-signal material parameters of PMN-PT with different PT contents

PT content/%	Dielectric constant/ kHz	Capacitance/ nF	Loss tangent/%	$d_{33}^{*}$/ (pC·N^–1)
26	4518	2.4	0.9	1170
29	5082	2.7	0.9	1500
33	6776	3.6	1.6	2200

Fig. 3 Impedance curves of PMN-PT with different PT contents (a) 26% PT; (b) 29% PT; (c) 33% PT

Fig. 4 $s_{11}^{E}$ curves of PMN-PT with different PT contents

Fig. 5 $k_{31}$ curves of PMN-PT with different PT contents

Fig. 6 $d_{31}$ curves of PMN-PT with different PT contents

Fig. 7 $Q_{\mathrm{m}}$ curves of PMN-PT with different PT content

Fig. S1 Infrared temperature probe monitoring image

Fig. S2 Temperature curve of the piezoelectric material

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PT含量变化对PMN-PT单晶的大功率性能影响

Effect of PbTiO₃ Content Variation on High-power Performance of PMN-PT Single Crystal

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PT含量变化对PMN-PT单晶的大功率性能影响

Effect of PbTiO3 Content Variation on High-power Performance of PMN-PT Single Crystal

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Effect of PbTiO₃ Content Variation on High-power Performance of PMN-PT Single Crystal