材料科学
压电
执行机构
陶瓷
压电系数
热稳定性
复合材料
铁电性
压力(语言学)
消散
大气温度范围
工作(物理)
光电子学
机械工程
电气工程
热力学
电介质
物理
工程类
量子力学
哲学
语言学
作者
Qi Guo,Xiangyu Meng,Fēi Li,Fangquan Xia,Pengbin Wang,Xiaoyi Gao,Jinsong Wu,Huajun Sun,Hua Hao,Hanxing Liu,Shujun Zhang
出处
期刊:Acta Materialia
[Elsevier]
日期:2021-06-01
卷期号:211: 116871-116871
被引量:20
标识
DOI:10.1016/j.actamat.2021.116871
摘要
Piezoelectric actuators are essential for numerous electromechanical applications, because of their advantages of high resolution, large generated forces, no friction, low heat dissipation and fast response. The design of the next-generation piezoelectric actuators is desired to meet the complex needs of advanced machines and instruments, where the high-performance and stable output under the combined thermal and mechanical loads are expected. However, simultaneously achieving high-performance and good temperature stability of piezoelectric actuators is a challenge, which hinders the use temperature range in practical applications. Here, in the studied Sm-doped Pb(Mg1/3Nb2/3)O3-PbZrO3-PbTiO3 system, the high piezoelectric strain coefficient d33* = 870 pm/V with superior temperature stability (below 7% variation over the temperature of 20°C to 280°C), together with negligible property degradation up to 106 cycles was successfully achieved. The outstanding blocking stress of 37.2 MPa and mechanical work of 6.4 kJ/m3 were obtained under the driving electric field of 15 kV/cm. This work provides a paradigm to achieve high piezoelectric strain properties with good temperature stability, where the studied materials are expected to greatly benefit the development of high temperature piezoelectric actuator applications.
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