Comparison between step and pulsed electroacoustic techniques using both PVDF and LiNbO3 transducers

Two kinds of piezoelectric transducers: thin PVDF foil and thick LiNbO3 crystal were used as strain waves detectors. The time domain analysis was applied in processing and interpretation of measured oscillograms. The space charge, electrical field and potential profiles across the thickness in three layered PTFE samples have been shown.