Sm掺杂增强PZT基弛豫型铁电陶瓷压电性能研究

doi:10.15541/jim20210146

无机材料学报 ›› 2021, Vol. 36 ›› Issue (12): 1270-1276.DOI: 10.15541/jim20210146

所属专题：【信息功能】电介质材料

Sm掺杂增强PZT基弛豫型铁电陶瓷压电性能研究

董昌¹^,²(), 梁瑞虹¹^,³(), 周志勇¹^,³, 董显林¹^,³

1.中国科学院上海硅酸盐研究所, 中国科学院无机功能材料与器件重点实验室, 上海 200050
2.中国科学院大学, 北京 100049
3.中国科学院上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050

收稿日期:2021-03-11 修回日期:2021-04-22 出版日期:2021-12-20 网络出版日期:2021-06-10
通讯作者: 梁瑞虹, 研究员. E-mail: liangruihong@mail.sic.ac.cn
作者简介:董昌(1997-), 男, 硕士研究生. E-mail: cdong@mail.ustc.edu.cn
基金资助:
中国科学院先导科技专项课题(XDA2203003);科技部重点研发计划(2018YFC0308603)

Piezoelectric Property of PZT-based Relaxor-ferroelectric Ceramics Enhanced by Sm Doping

DONG Chang¹^,²(), LIANG Ruihong¹^,³(), ZHOU Zhiyong¹^,³, DONG Xianlin¹^,³

1. Key Laboratory of Inorganic Functional Materials and Devices of CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:2021-03-11 Revised:2021-04-22 Published:2021-12-20 Online:2021-06-10
Contact: LIANG Ruihong, professor. E-mail: liangruihong@mail.sic.ac.cn
About author:DONG Chang (1997-), male, Master candidate. E-mail: cdong@mail.ustc.edu.cn
Supported by:
Pilot Technology for Chinese Academy of Sciences(XDA2203003);Key R&D Program of the Ministry of Science and Technology of the People’s Republic of China(2018YFC0308603)

摘要/Abstract

摘要：

锆钛酸铅(PZT)基压电陶瓷是一类应用非常广泛的功能材料, 可应用于水声换能器、压电马达、医疗超声换能器以及声表面波滤波器等。通过改性提高PZT基压电陶瓷的压电性能一直是该领域的研究热点。本工作采用传统固相反应法制备了准同型相界(Morphotropic Phase Boundary, MPB)组分的Sm-0.25PMN-0.75PZT压电陶瓷, 并对其微观结构以及宏观性能进行了系统研究。研究结果表明：引入Sm³⁺可以增强压电陶瓷的局域结构异质性, 提升介电响应从而提高压电性能。当Sm³⁺引入过多时, 铁电极化的长程连续性被大面积打断, 压电性能下降。本实验中得到的最优组分压电陶瓷性能为：高压电系数d₃₃~824 pC/N, 高压电电压常数g₃₃~27.1×10^-3 m²/C和相对较高居里温度T_C~178 ℃, 电致应变在室温至150 ℃范围内低于5%, 有较好的温度稳定性, 是极具应用前景的高性能压电材料。

关键词: PZT, 局域结构异质性, 准同型相界(MPB), 高压电系数

Abstract:

Lead zirconate titanate (PZT)-based piezoelectric ceramics are a type of functional material with a wide range of applications, which can be used in ultrasound transducers, piezomotor, medical ultrasound transducer, and surface acoustic wave filter, etc. Improving the piezoelectric property of PZT-based piezoelectric ceramics through modification has always been a research hotspot in this field. In this work, Sm-0.25PMN-0.75PZT piezoelectric ceramics near the morphotropic phase boundary (MPB) were fabricated by conventional solid-phase reaction method, and its microstructure and macroscopic property were systematically studied. The research results show that introduction of Sm³⁺ can enhance the local structural heterogeneity of piezoelectric ceramics, accelerate the dielectric response, and improve the piezoelectric performance. When Sm³⁺ is excessively introduced, the long- range continuity of ferroelectric polarization is interrupted in a large area while the piezoelectric performance decreases. The performance of the optimal composition piezoelectric ceramic obtained in this experiment is: high voltage electric coefficient (d₃₃~824 pC/N), high voltage electric voltage constant (g₃₃~27.1×10^-3 m²/C), and relatively high Curie temperature (T_C~178 ℃). The electrostrain is less than 5% in the range of room temperature to 150 ℃, with relatively good temperature stability. Therefore, this PET-based relaxor-ferrelectric ceramic is a high- performance piezoelectric material with great application prospects.

Key words: PZT, local structure heterogeneity, morphotropic phase boundary (MPB), high piezoelectric coefficient

中图分类号:

TQ174

董昌, 梁瑞虹, 周志勇, 董显林. Sm掺杂增强PZT基弛豫型铁电陶瓷压电性能研究[J]. 无机材料学报, 2021, 36(12): 1270-1276.

DONG Chang, LIANG Ruihong, ZHOU Zhiyong, DONG Xianlin. Piezoelectric Property of PZT-based Relaxor-ferroelectric Ceramics Enhanced by Sm Doping[J]. Journal of Inorganic Materials, 2021, 36(12): 1270-1276.

图/表 9

图1 ySm-0.25PMN-0.75PZT陶瓷的表面、断面形貌及晶粒尺寸分布图

Fig. 1 Surface and cross sectional SEM images and grain size distributions of ySm-0.25PMN-0.75PZT ceramics (a) y=0; (b) y=0.4%; (c) y=0.8%; (d) y=1.2%

图2 ySm-0.25PMN-0.75PZT陶瓷的X射线衍射图谱

Fig. 2 XRD patterns of ySm-0.25PMN-0.75PZT ceramics (a) 10°-90°; (b) Near 45°

图3 ySm-0.25PMN-0.75PZT陶瓷在压电力显微镜下的畴随Sm含量的演变图

Fig. 3 PFM phase images (2 μm×2 μm) of ySm-0.25PMN-0.75PZT ceramics (a) y=0; (b) y=0.4%; (c) y=0.8%; (d) y=1.2%

图4 ySm-0.25PMN-0.75PZT陶瓷在(a)y=0, (b)y=0.4%, (c)y=0.8%, (d)y=1.2%的介电温谱曲线@100 Hz~1 MHz; (e)各组分介电温谱对比图@1 kHz

Fig. 4 Temperature dependence of dielectric constant and dielectric loss of ySm-0.25PMN-0.75PZT ceramics (a) y=0, (b) y=0.4%, (c) y=0.8%, (d) y=1.2% @100 Hz-1 MHz; (e) y=0, 0.4%, 0.8%, 1.2%@1 kHz

图5 ySm-0.25PMN-0.75PZT陶瓷的P-E曲线图

Fig. 5 P-E loops of ySm-0.25PMN-0.75PZT ceramics

表1 ySm-0.25PMN-0.75PZT陶瓷的综合性能表

Table 1 Comprehensive property of ySm-0.25PMN-0.75PZT ceramics

y	d₃₃/(pC·N^-1)	g₃₃/(×10^-3, m²·C^-1)	ε_r	tanδ	E_c/(kV·mm^-1)	P_r/(μC·cm^-2)	T_c@1kHz/℃	k_p	k_t	k₃₃
0	543	24.8	2475	0.028	0.77	42.5	199	0.58	0.41	0.67
0.4%	824	27.1	3434	0.032	0.80	38.7	178	0.67	0.52	0.77
0.8%	678	20.5	3744	0.039	0.88	27.2	156	0.59	0.46	0.70
1.2%	522	13.9	4239	0.041	0.76	24.9	144	0.43	0.33	0.52

表2 本研究与文献报道的压电陶瓷性能对比

Table 2 Comparison of properties between ceramics in this work and literature

Ceramic	d₃₃/(pC·N^-1)	g₃₃/(×10^-3, m²·C^-1)	ε_r	T_c@1kHz/℃	Ref.
Sm-PMN-PT	1510	13.1	13000	89	[16]
PMN-PT	663	14.2	5260	159	[14]
PZT5H	590	19.6	3400	193	[36]
0.4%Sm-0.25PMN-0.75PZT	824	27.1	3434	177	This work

图6 ySm-0.25PMN-0.75PZT陶瓷的介电常数-温度曲线 @1 kHz(从低温至室温)

Fig. 6 Temperature dependences of dielectric constant of ySm-0.25PMN-0.75PZT@1 kHz from cryogenic temperature to room temperature

图7 0.4%Sm-0.25PMN-0.75PT陶瓷各性能随温度的变化图

Fig. 7 Temperature dependence of properties for 0.4%Sm- 0.25PMN-0.75PZT ceramics (a) Piezoelectric coefficient, dielectric constant, residual polarization; (b) Field-induced longitudinal strain

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Sm掺杂增强PZT基弛豫型铁电陶瓷压电性能研究

Piezoelectric Property of PZT-based Relaxor-ferroelectric Ceramics Enhanced by Sm Doping

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