著者

福壽 快斗 朝倉 義幸 香田 忍

出版者

日本ソノケミストリー学会

雑誌

ソノケミストリー討論会講演要旨集

巻号頁・発行日

no.22, pp.39-40, 2013-10-25

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We have re-examined the frequency dependence of the cavitation threshold for air-saturated water and organic solvents. Cavitation threshold was estimated by observation of generation of cavitation from the results of the polymer degradation effect and acoustic spectrum. We used direct irradiation type and indirect irradiation type ultrasonic reactor in this experiment. All experiments were performed in the driving power 0.5〜50W, fluid volume 50mL, the driving frequency 20kHz〜5MHz. Cavitation threshold which is calculated from the results of the polymer degradation was larger than the cavitation threshold, which is calculated from the acoustic spectrum measurement. Regardless of solvents, in the frequency range below 45kHz, cavitation threshold decreased with increasing the frequency. Further, in the frequency range above 45kHz, cavitation threshold gradually increased with increasing the frequency.