Effect of diameter-to-thickness ratio of crystal disks on the vibrational characteristics of ultrasonic ceramic transducers
✍ Scribed by Rupa Mitra
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 851 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0003-682X
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✦ Synopsis
The processes of generation and detection of ultrasonic waves through solids and fluids using piezoelectric ceramic (PZT) transducers essentially require the eficient Iaunching of compressional waves into adjoining media. This primarily depends upon the distribution of vibrational amplitude over the radiating surface of the transducer which, on the other hand, is a function of the diameter-to-thickness (D/t) ratio of the transducer element (ceramic disk) used. Studies are reported on the vibrational amplitude characteristics of PZT-5 ceramic transducers for airborne applications in the megahertz frequency range employing the phase-locked laser interferometry technique, where ceramic disks with the D/t ratio ranging between 2 and I I have been used. Variations of displacement amplitude behaviour with the change in D/t values are discussed. Observed results would be of signt$cant use in fabricating ultrasonic transmitters and receivers to produce the desired surface distribution of vibrational amplitude suitable for spectfic applications.