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测量了不同浓度酒精水溶液中单泡声致发光随驱动超声声压大小变化关系曲线.结果表明,根据光强-声压(I-Pa)曲线的变化关系,可以把酒精浓度分为3个区域.(1)在较低浓度时,随着酒精浓度的增加,曲线往低声压方向移动,驱动声压变化较大;相同声压下,单泡声致发光的发光强度随酒精浓度增加而增加.(2)当酒精浓度稍高时,驱动声压变化较小;相同声压下,单泡声致发光光强随酒精浓度的增加而降低.(3)进一步增加酒精浓度,光强随酒精浓度变化关系趋势在不同声压下的关系不同,但I-Pa曲线的斜率随酒精浓度的增加而降低.可以通过气泡动力学以及酒精的物理化学性质解释这些结果,同时这些结果也有助于进一步了解单泡声致发光的发光机制.
The relationship curves of the acoustic emission intensity of single bubble with the driving ultrasonic pressure in aqueous solution of different concentrations were measured.The results showed that the concentration of alcohol could be divided into three regions according to the change of I-Pa curve, . (1) At lower concentration, with the increase of alcohol concentration, the curve shifted to low sound pressure and the driving sound pressure changed a lot. Under the same sound pressure, the luminescence intensity of single bubble sonic emission increased with the increase of alcohol concentration (2) When the alcohol concentration is slightly higher, the driving sound pressure has a smaller change. Under the same sound pressure, the light intensity of the single bubble decreases with the increase of the alcohol concentration. (3) The alcohol concentration is further increased The relationship between changes in alcohol concentration has a different relationship at different sound pressures, but the slope of the I-Pa curve decreases with increasing alcohol concentration. These results can be explained by bubble dynamics and the physicochemical properties of alcohol, and these results also contribute to Learn more about the light-emitting mechanism of single bubble sonoluminescence.