| Autor: |
Banchet, J., Cheeke, J. D. N. |
| Zdroj: |
Journal of the Acoustical Society of America; 2000, Vol. 108 Issue 6, p2754-2758, 5p |
| Abstrakt: |
This work consists of a systematic study of the acoustic nonlinearity parameter (B/A) in 1-alkanols from methanol to 1-decanol, ketones from acetone to methyl hexyl ketone, and alkyl acetates from ethyl to octyl acetate. By focusing a 14-MHz tone burst through a spherical quartz lens in each solvent, the second harmonic is generated and measured by a 28-MHz transducer at various distances from the focus. This provides the point of maximum second harmonic power, and enables the computation of the nonlinear parameter using a simple model. The B/A values thus obtained are in reasonable agreement with these available in the literature. The B/A values are found to increase with chain length and sound velocity, this increase being in contradiction with Ballou's rule. Moreover, a hybrid model based on Schaaffs' formula for sound velocity fits the experimental results, questioning the validity of Ballou's rule for solvents within a single chemical family. © 2000 Acoustical Society of America. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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