Resonant and equivalent circuit characteristics of piezoelectric ceramics disk with different (diameter-to-thickness) ratio

Ming Cheng Chure, Long Wu, King Kung Wu, Yu Chang Lin, Meng Jiun Wu, Chia Cheng Tung, Yi Yu Lu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, the resonant spectrum of the piezoelectric ceramic thin disk with different diameter-to-thickness ratio in the frequency range from 50 kHz to 1 MHz was studied by the impedance analysis method. If the diameter-to-thickness ratio was higher than 15, the vibration mode of the piezoelectric ceramic thin disk was pure radial mode, besides the fundamental radial mode, there are some radial overtone modes with inharmonic frequency separation in the entire frequency range from 50 kHz to 1 MHz. The number of radial overtone modes depended on the diameter; the ceramic disk with larger diameter had more overtone modes than that of ceramic disk with smaller diameter. With the same diameter, the resonant frequency ratio of fundamental mode to that of overtone mode was decreased with the increasing of thickness. With the same thickness, the resonant frequency ratio of fundamental mode to that of overtone mode was decreased with the decreasing of diameter. But when the diameter-to-thickness ratio was less than 15, some other vibration modes were existed in the frequency range higher than 600 kHz. From experiment, it is found that the effective electromechanical coupling factor keff was decreased with the increasing of overtone mode order. The decrease of effective electromechanical coupling factor keff was due to the less electrical energy transfer to mechanical energy with the increasing of overtone mode order. In the equivalent circuit, the motional resistance R1 and the motional inductance L1 were increased, but the motional capacitance C1 and the capacitance Co were decreased with the increasing of overtone mode order.

Original languageEnglish
Title of host publicationProceedings of the 2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013
PublisherIEEE Computer Society
ISBN (Print)9781479932894
DOIs
Publication statusPublished - 2013 Jan 1
Event2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013 - Changsha, China
Duration: 2013 Oct 252013 Oct 27

Publication series

NameProceedings of the 2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013

Other

Other2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013
CountryChina
CityChangsha
Period13-10-2513-10-27

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

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    Chure, M. C., Wu, L., Wu, K. K., Lin, Y. C., Wu, M. J., Tung, C. C., & Lu, Y. Y. (2013). Resonant and equivalent circuit characteristics of piezoelectric ceramics disk with different (diameter-to-thickness) ratio. In Proceedings of the 2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013 [6841107] (Proceedings of the 2013 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2013). IEEE Computer Society. https://doi.org/10.1109/SPAWDA.2013.6841107