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Ultrasonic study on organic liquid and binary organic liquid mixtures by using Schaaffs' collision factor theory 总被引:1,自引:0,他引:1
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Based on Schaaff's collision factor theory (CFT) in liquids, the equations for
nonlinear ultrasonic parameters in both organic liquid and binary organic liquid
mixtures are deduced. The nonlinear ultrasonic parameters, including pressure
coefficient, temperature coefficients of ultrasonic velocity, and nonlinear acoustic
parameter B/A in both organic liquid and binary organic liquid mixtures, are
evaluated for comparison with the measured results and data from other sources. The
equations show that the coefficient of ultrasonic velocity and nonlinear acoustic
parameter B/A are closely related to molecular interactions. These nonlinear
ultrasonic parameters reflect some information of internal structure and outside
status of the medium or mixtures. From the exponent of repulsive forces of the
molecules, several thermodynamic parameters, pressure and temperature of the medium,
the nonlinear ultrasonic parameters and ultrasonic nature of the medium can be
evaluated. When evaluating and studying nonlinear acoustic parameter B/A of binary
organic liquid mixtures, there is no need to know the nonlinear acoustic parameter
B/A of the components. Obviously, the equation reveals the connection between the
nonlinear ultrasonic nature and internal structure and outside status of the
mixtures more directly and distinctly than traditional mixture law for B/A, e.g.
Apfel's and Sehgal's laws for liquid binary mixtures. 相似文献
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