Cavitation sensor with hydrothermally synthesized lead zirconate titanate poly-crystalline film deposited on Ti cylindrical hollow pipe

A small cavitation sensor was developed in our laboratory by deposition of hydrothermally synthesized lead zirconate titanate poly-crystalline film on outer surface of Ti hollow cylindrical pipe. The spatial distributions of acoustic cavitation generated in a vessel of 150 kHz sonoreactor were measured by using our cavitation sensor. We estimated the spatial distribution of acoustic cavitation by using broad band integrated voltage (BIV) calculated from the output signal of our cavitation sensor. A similar spatial distribution of the BIV to a sonochemical luminescence (SCL) pattern could be observed in the measured results. Our fabricated cavitation sensor could be applied to the measurement for spatial distribution of acoustic cavitation in a high-intensity ultrasound field for a period longer than 100 hours without damage. We measured the spatial distribution and directivity of the receiving sensitivity for the characterization of our cavitation sensor. It is suggested from the measured results that the BIV and the cavitation signal included in the output signal from the cavitation sensor are based on the acoustic cavitation generated in the cylindrical hollow of our cavitation sensor.