Relations between losses in piezoelectric ceramic and the magnitude of its vibration level
Abstract
In the paper the method of the mechanical and electrical loss measurements using a piezoelectric transformer has been applied to determine the relations between the losses and the magnitude of the vibration velocity, strain and stress. The measurements and calculations have been realized for the soft and hard PZT-type ceramics. Good accordance of the obtained results with the results obtained by the other authors, applying different measurement methods, proves the usability of the method of loss measurements proposed by the author.References
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[2] C.W. Bert and V. Birman, Effects of stress and electric field on the coefficients of piezoelectric materials: one-dimensional formulation, Mechanics Res. Commun., 25, 2, 165–169 (1998).
[3] W.G. Cady, Piezoelectricity, Mc Graw Hill, New York 1946, Ch. V, XIII and XV.
[4] D. Damjanovic and D.V. Taylor, Contributions to the nonlinear dielectric and piezoelectric response of ferroelectric thin films and ceramics, Ferroelectrics, 221, 137–146 (1999).
[5] G.H. Haertling, Ferroelectric ceramics, J. Am. Ceram. Soc., 82, 4, 797–818 (1999).
[6] D.A. Hall, Rayleigh behaviour and the threshold field in ferroelectric ceramics, Ferroelectrics, 223, 319-328 (1999).
[7] IRE Standards on piezoelectric crystals: Measurement of piezoelectric ceramics, Proc. IRE, 49, 7, 1161–1169 (1961).
[8] K. Ishii, N. Akimoto, S. Tashiro and H. Igarashi, Analysis of nonlinear phenomena in piezoelectric ceramics under high-power vibration, J. Ceram. Soc. Jpn., 106, 6, 555–558 (1998).
