FABRICATION AND PROPERTIES OF 2-2 MULTI-ELEMENT PIEZOELECTRIC COMPOSITE

摘要：

A 2-2 type multi-element piezoelectric composite was fabricated using PZT-5 as functional part,silicon gel and polyurethane as decoupling material to ensure the independence of transmitted acoustic beam and strengthen the signal power.The effects of composite thickness and decoupling material on dielectric,piezoelectric and electromechanical coupling properties were investigated.The results show that the piezoelectric,dielectric and the electromechanical coupling properties of each piezoelectric element in the composite exhibit excellent consistency.The relative permittivity of epoxy/silica piezoelectric composites(ESP) is higher than that of epoxy resin piezoelectric composites(ERP) and epoxy/polyurethane piezoelectric composites(EPP) at the same thickness,and EPP has the lowest permittivity.Multi-element piezoelectric composites can significantly improve the thickness electromechanical coupling coefficient (Kt) and reduce the mechanical quality factor(Qm),in which Kt value of EPP is up to 65.19％.With increasing the composite thickness,the Qm value of the composites slightly decreases.

关键词： Piezoelectric composite Multi-element Dielectric properties Piezoelectric properties

作者: Bo GENG Dong-yu XU Su-hui ZHAI Shi-feng HUANG Xin CHENG

作者单位: Shandong provincial Key Lab. of Preparation and Measurement of Building Materials,University of Jinan, Jinan, 250022, P. R. China

会议类型: 国际会议

会议名称: The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)

会议地点: 西安

会议语种:英文

页码: 257-260

在线出版日期: 2016-10-21（万方平台首次上网日期，不代表论文的发表时间）