Air-coupled ultrasonic transducers based on cellular polypropylene ferroelectret films

作者：Bovtun Viktor; Doering Joachim; Bartusch Jurgen; Beck Uve; Erhard Anton; Yakymenko Yuriy

来源：Ferroelectrics, 2007, 353: 620-626.

DOI：10.1080/00150190701368141

• air-coupled ultrasonics
• non-contact transducers
• ferroelectrets
• electromechanical properties

Analysis of the dielectric and electromechanical properties of the cellular polypropylene ferroelectret films (EMFIT) evidences their high potential for the application in the air-coupled ultrasonic transducers. Simple prototype transducers, based on the EMFIT films, were developed and their high sensitivity was proved in the air-coupled ultrasonic experiment. Amplitude and delay time scanned images of the polyethylene step wedge with holes, obtained in both pulse-echo and transmission modes, demonstrate that non-contact ultrasonic imaging with EMFIT transducers is possible.

• 出版日期2007