Acoustic power flow in a LiNbO3 single crystal was calculated to find the optimal crystal cutting orientation and the wave propagation direction for the efficient excitation of acoustic waves in the crystal. By solving the stiffened Christoffel equations and calculating the acoustic Poynting vectors with piezoelectric effect included, maximum longitudinal acoustic power flow in a 30° Z-rotated, Y-cut LiNbO3 crystal was found.
Stanford UniversityPVF2 bulk wave transducers are made by bonding PVFZ film (=1/2" X 1/2") onto brass backing 25 rods with V-6 epoxy. The PVF2 film is obtained from Kureha Corporation in stretched, poled and electroded form. We etch off the aluminum electrodes, which erode quickly when placed in water, and put down a thin layer of chrome followed by a layer of gold ( Y 1000 A).
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