EFFECTS OF THICKNESS ON PROPERTIES OF HIGH FREQUENCY PIEZOELECTRIC ULTRASONIC TRANSDUCERS

摘要：

　　Piezoelectric ultrasonic transducer is a device to realize the conversion between electric energy and mechanical energy.The core element of the transducer is piezoelectric material, which directly affects the performance of transducer.High frequency ultrasonic transducers have higher resolution, and can recognize smaller size targets.The performances of the transducer are dependent on the frequency characteristics.The results show that the relative permittivity, piezoelectric strain constant, piezoelectric voltage constant and mechanical quality factor of the piezoelectric transducer increase with increasing thickness of piezoelectric material, and the thickness electromechanical coupling properties and resonant frequency decrease with increasing thickness.In the pulse response test of the transducers, with increasing thickness of the piezoelectric material, the transmitted time and peak-peak value of the ultrasonic wave received by the transducer increase, and the dominant frequency shows the decreasing trend.

关键词： Piezoelectric Ultrasonic transducers Piezoelectric properties Dielectric properties

作者: Shan-ling YI Bo GENG Guang-peng GAO Wen-kang ZHANG Ying-ying Wang Peng DU Dong-yu XU

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 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)

会议地点: 成都

会议语种:英文

页码: 129-133

在线出版日期: 2017-10-27（万方平台首次上网日期，不代表论文的发表时间）