具有良好温度稳定性的1-3型PZT/epoxy压电复合材料  

1-3 PZT/epoxy Piezoelectric Composites with High Temperature Stability

作　　者：周春鸣 张家良[1] 曹月 苏文斌[1] ZHOU Chunming;ZHANG Jialiang;CAO Yue;SU Wenbin(School of Physics,Shandong University,Jinan 250100,Shandong,China)

机构地区：[1]山东大学物理学院,山东济南250100

出　　处：《陶瓷学报》2021年第4期675-680,共6页Journal of Ceramics

基　　金：国家自然科学基金(51972196);山东省自然科学基金(ZR2019MEM017)。

摘　　要：1-3型压电复合材料是一类人工合成、可实现超声换能的重要功能材料。在实际应用中,压电性能的温度稳定性往往是一项重要的技术指标,但相关的文献报道较少。因此,有必要对1-3型压电复合材料的温度稳定性开展研究。选用一种优质的商品化PZT-43陶瓷,以改进的切割填充技术制备1-3型PZT/epoxy压电复合材料,考察了其室温机电耦合性能和压电温度稳定性。结果显示,该复合材料性能均衡,其机电耦合系数kt为0.65、介电损耗tanδ为0.019、压电电压系数g33为46×10^(-3) Vm/N、声阻抗Z为15.5 Mrayl。在-30℃~100℃的常用温度范围内,△kt≤±3%,kt比较稳定。研究表明,选择合适的PZT陶瓷是获得优异1-3型压电复合材料的前提。Piezoelectric composites with 1-3 connectivity have attracted great attentions recently for the applications in ultrasonic transducers,such as biomedical imagers and industrial flaw detectors.However,piezoelectric temperature stability of the composites has rarely been reported in the literature,which is vital for practical applications.A commercially available PZT-43 ceramic was adopted to prepare 1-3 PZT/epoxy piezoelectric composite with an improved dice-fill method,whose room-temperature piezoelectric performances and electromechanical temperature stability were studied.This composite showed well-balanced overall performance,with thickness-mode electromechanical coupling coefficient(kt)of 0.65,dielectric loss(tanδ)of 0.019,coefficient(g33)of 46×10^(−3) Vm/N and acoustic impedance(Z)of 15.5 Mrayl.kt is very stable,with a change rate of less than±3%in the common application temperature range from-30℃to 100℃.Therefore,selecting a proper PZT ceramic is an essential precondition for the development of high performance piezoelectric composites.

关 键 词：1-3压电复合材料 PZT陶瓷 机电耦合系数 温度稳定性 

分 类 号：TQ174.75[化学工程—陶瓷工业]