A systematic analysis of the radial resonance frequency spectra of the PZT-based (Zr/Ti = 52/48) piezoceramic thin disks

Abstract

In this paper, both the 1D radial mode and the equivalent circuit of a piezoceramic disk resonator were theoretically analyzed based on IEEE standards. And then, the radial resonance frequency spectra of the PZT-based (Nb/Ce co-doped Pb(Zr 0.52 Ti 0.48)O 3 , abbreviated as PZT-NC) piezoceramic circular disks were measured by an impedance analyzer. A set of resonance frequency spectra including six electrical parameters: Z, R, X, Y, G, and B, were used for making a value distinction between three possible resonance frequencies, and between three possible antiresonance frequencies. A new-form Nyquist diagram was depicted to describe the position relations of these characteristic frequencies. Such a complete resonance frequency spectrum was used to perform the accurate calculation of some material constants and electromechanical coupling parameters for the PZT-NC piezoceramics. Further, the frequency dependence of the AC conductive behavior of the specimen was characterized by the complex impedance measurement. The values of AC conductivity at resonance/antiresonance were deduced from the equivalent circuit parameters. Moreover, the Van Dyke circuit model was assigned to each element contribution and the simulated curves showed a nice fitting with the experimental results. Finally, an additional impedance analysis associated with resonance frequency calculation revealed a complicated coupled vibration mode existing in the annular disk specimen.

Transmission Sensitivities of Contact Ultrasonic Transducers and Their Applications

“…For PZT-5A piezoceramic used here, the planar coupling factor, k p , for planar extension is 0.60 and Kunkel et al [ 33 ] showed that the radial modes for such a high k p value are difficult to suppress. At k p = 0.60, f A /f R is equal to 1.19 using an expression, k p 2 = 1.51 − f R /2f A − (f R /f A ) 2 from Chen et al [ 35 ] and is in the same range as the observed ratios of 1.08 to 1.15 for the PZT disks observed above. For R15, it was 1.15 to 1.27.…”

“…Piezoelectric disks are the functional elements of most UT and AE transducers and their vibration behavior has been studied [ 21 , 31 , 32 , 33 , 34 , 35 ]. However, transmission and receiving sensitivities of a disk element are difficult to find.…”

“…The observed higher peak frequencies for receiving sensitivity correspond to antiresonance frequencies (f A ) of the radial mode since the high impedance at f A contributes to improved detection. The ratio of antiresonance and resonance frequencies, f A /f R , of the radial mode is dictated by the coupling factor of piezoceramics, as discussed in [ 33 , 35 ]. For PZT-5A piezoceramic used here, the planar coupling factor, k p , for planar extension is 0.60 and Kunkel et al [ 33 ] showed that the radial modes for such a high k p value are difficult to suppress.…”

Effects of Oxide Additives on the Phase Structures and Electrical Properties of SrBi4Ti4O15 High-Temperature Piezoelectric Ceramics

“…The resonance-antiresonance peaks of SGBT and SCBT appear, respectively, at 184 kHz and 186 kHz. A high angle indicates the fully poled state of the specimen [ 38 ]. The position generated the resonance-antiresonance peak and the maximum phase angle also converts with the introduction of other additives.…”

Progress and perspectives in dielectric energy storage ceramics

“…ceramic located at morphotropic phase boundary (MPB) where Zr:Ti is of 52:48, possesses a high piezoelectric activity (d 33 up to 300 pC/N) and good temperature stability, and becomes an extremely popular dielectric material[61][62][63]. In addition, other ceramic compositions such as PZT 65/35, 70/30 also received more attention and no limitation by piezoelectric properties[64,65].…”