Vahid Safavi Ardebili, Anthony N. Sinclair, and Jan K. Spelt
ABSTRACT
A method is presented for estimating the compression wave velocities of organic fluids, based only on their density and molecular properties. The method is applied to a search for very low-speed ultrasonic couplants, suitable for 250 MHz acoustic microscopy studies of epoxy materials. Experimental measurements confirmed that acoustic velocity could be predicted within 3% for simple fluorine-containing organic compounds, and within 10% for those with a more complex molecular structure. The compound 2-dichloropentafluoropropane (C3HCl2F5), with a compression wave velocity of CL = 638 m/s and acceptably low attenuation coefficient, was identified as a good coupling agent for acoustic microscopy studies of low speed materials.1997 IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 44:102-107
© 1997, by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved.