CELLULAR POLYPROPYLENE FERROELECTRET FILM:PIEZOELECTRIC MATERIAL FOR NON-CONTACT ULTRASONIC TRANSDUCERS

摘要：

Electromechanical properties of the cellular polypropylene ferroelectret films (EMFIT) evidence their high potential for the air-coupled ultrasonic applications. The disadvantage with respect to their low coupling factor could be compensated by the extremely low acoustic impedance. A figure of merit is proposed to compare and estimate piezoelectric materials intended for the air-coupled ultrasonic applications. Electron beam evaporation technology was adapted to the EMFIT films and films with two-sided Au and Al electrodes were prepared without reducing or suppressing of the electromechanical properties. Finally, air-coupling ultrasound transducers based on the EMFIT films were developed and characterized.

作者: Joachim D(O)RING Viktor BOVTUN Jürgen Bartusch Uwe Beck Marc Kreutzbruck

作者单位: Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin,Germany, Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin,Germany,Inst

会议类型: 国际会议

会议名称: 第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)

会议地点: 上海

会议语种:英文

页码: 702-707

在线出版日期: 2008-10-25（万方平台首次上网日期，不代表论文的发表时间）