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|Title:||Mode coupling in lead zirconate titanate/epoxy 1-3 piezocomposite rings|
|Authors:||Or, Derek Siu-wing|
Chan, Helen L. W.
|Publisher:||American Institute of Physics|
|Source:||Journal of applied physics, 15 Oct. 2001, v. 90. no. 8, p. 4122-4129.|
|Abstract:||Lead zirconate titanate (PZT)/epoxy 1-3 piezocomposite rings were fabricated with PZT volume fractions Φ ranging from 0.82 to 0.94 and with a small epoxy width of 77 µm in order to investigate their resonance characteristics and to reveal the mode coupling. Four major resonance modes were observed, namely the coupled longitudinal-thickness f[sub H] and lateral f[sub L1] and f[sub L2] mode resonances of individual PZT elements inside the rings as well as the radial f[sub R] and wall-thickness f[sub W] mode resonances of the whole rings. No stopband resonances were observed in the frequency range of 1 to 10 MHz. f[sub H] was found to increase linearly with the decrease in element height while f[sub L1] and f[sub L2] remained constant. When the height and width of the elements became comparable, coupling of f[sub H] with f[sub L1] and f[sub L2] occurred. The observed f[sub H], f[sub L1], and f[sub L2] for all samples agreed with those calculated by the mode-coupling theory. f[sub R] and f[sub W] were almost independent of the ring thickness but increased as Φ increased. A guide of operating f[sub H] in the rings without causing mode coupling was presented to optimize the composite structure for transducer design.|
|Rights:||© 2001 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in S.W. Or & H.L.W. Chan, J. Appl. Phys. 90, 4122 (2001) and may be found at http://link.aip.org/link/?jap/90/4122|
|Appears in Collections:||MRC Journal/Magazine Articles|
AP Journal/Magazine Articles
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