Journal: Volume 21, No. 3, 2016
Pages: 24 – 35
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Determination of electrical impedance of piezoceramic disk and its calculation in low-frequency region

Оleg Petrishchev, Constantine Bazilo

Abstract

The final goal of mathematical modeling of physical condition of vibrating piezoelectric elements is a qualitative and quantitative description of characteristics and parameters of existing electrical and elastic fields. It is clear that to obtain meaningful and reliable quantitative estimates of physical condition parameters of piezoelectric (piezoceramic) element is not possible without reliable data on the values of physical and mechanical constants of the materials. Thus, it is necessary to build noncontradictory method of material constants experimental determination of piezoelectric ceramics, which delivers reliable values of at least three modules of elasticity, two elements of the matrix of piezoelectric coefficients and one element of the matrix of dielectric constants, which is the purpose of the work. The main results of this paper can be written as follows: – at sufficiently general initial assumptions a mathematical description of electrical impedance of oscillating thin piezoceramic disk with end surfaces continuous covering by electrodes in vacuum is obtained; – it has been shown that electrical impedance of the disk is determined by average values of axial and radial components of material particles displacement vector of deformed piezoceramics; – the evaluation of electrical impedance of piezoceramic disk at low frequencies is completed, when persistence mode (equal to zero) of mechanical stresses in an oscillating disk volume is realized

Keywords

thin disk, piezoelectric ceramics, electrical impedance, radial and axial components of vector of piezoceramic material particles displacement

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Suggested citation

Petrishchev, O., & Bazilo, C. (2016). Determination of electrical impedance of piezoceramic disk and its calculation in low-frequency region. Bulletin of Cherkasy State Technological University, 21(3), 24-35.