Estimation of Cavitation Sensor with Hydrothermally Synthesized Lead Zirconate Titanate Film on Titanium Cylindrical Pipe: Spatial Distribution of Acoustic Cavitation Field and Basic Characteristics of Cavitation Sensor
We developed a small cavitation sensor by the deposition of a hydrothermally synthesized lead zirconate titanate (PZT) polycrystalline film on a Ti hollow cylindrical pipe. The spatial distributions of acoustic cavitation generated in a vessel of 150 kHz sonoreactor were measured by using our cavita...
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| Published in | Japanese Journal of Applied Physics Vol. 50; no. 7; pp. 07HE02 - 07HE02-5 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
The Japan Society of Applied Physics
01.07.2011
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| Online Access | Get full text |
| ISSN | 0021-4922 1347-4065 |
| DOI | 10.1143/JJAP.50.07HE02 |
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| Summary: | We developed a small cavitation sensor by the deposition of a hydrothermally synthesized lead zirconate titanate (PZT) polycrystalline film on a 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 the 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 pattern could be observed in the measured results. Our fabricated cavitation sensor could be applied to the measurement of sound pressure in a high-intensity ultrasound field with acoustic cavitation for a period longer than 150 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. |
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| Bibliography: | Our fabricated cavitation sensor with Ti hollow, open-ended, cylindrical pipe and hydrothermally deposited PZT polycrystalline film. Left: photograph. Right: schematic structure. Freqency spectrum of output signal from our cavitation sensor in a sonoreactor driven at 150 kHz: (a) Frequency range: DC to 1 MHz and (b) frequency range: DC to 10 MHz. Measurement system for spatial distribution of BIV of output signal from our cavitation sensor in the 150 kHz sonoreactor. Configuration of measurement for directivity of receiving sensitivity of our cavitation sensor by using commercial ultrasound probe for transmitter. The directivity of the cavitation sensor was measured by rotation in the angle range from $-90$ to 90°. Rx: our fabricated cavitation sensor; Tx: commercial water immerse-type ultrasound probe for transmitter. Configuration of measurement for relationship between distance of our cavitation sensor and that of transmitting polymer piezoelectric film transducer in the coincidental case between axes of the cavitation sensor and the transmitting transducer. Rx: our fabricated cavitation sensor; Tx: cylindrical piezoelectric polymer film transducer for transmitter. Configuration of measurement for relationship between distance of our cavitation sensor and that of transmitting polymer piezoelectric film transducer in the perpendicular case between the axes of transmitting probe and the cavitation sensor. Rx: our fabricated cavitation sensor; Tx: cylindrical piezoelectric polymer film transducer for transmitter. Spatial distributions of BIV and SCL measured in a water tank of our 150 kHz sonoreactor with output voltage of 300 mV from a function generator. Spatial distributions of BIV and SCL measured with output voltage of 500 mV from a function generator. Directivity of receiving sensitivity of our cavitation sensor measured at 5 MHz. Relationships between moving distance of US probe in axis direction of the cavitation sensor and receiving sensitivities inside and outside of cylindrical space of our cavitation sensor at 5 MHz. |
| ISSN: | 0021-4922 1347-4065 |
| DOI: | 10.1143/JJAP.50.07HE02 |