Propagation of Bleustein–Gulyaev wave in 6mm piezoelectric materials loaded with viscous liquid

Abstract

The influence of a viscous liquid on acoustic waves propagating in elastic or piezoelectric materials is of particular significance for development of liquid sensors. Bleustein-Gulyaev wave is a shear-type surface acoustic wave and has the advantage of not radiating energy into the adjacent liquid. These features make the B-G wave sensitive to changes in both mechanical and electrical properties of the surrounding environment. The Bleustein-Gulyaev wave has been reported to be a good candidate for liquid sensing application. In this paper, we investigate the potential application of B-G wave in 6 mm crystals for liquid sensing. The explicit dispersion relations for both open circuit and metalized surface boundary conditions are given. A numerical example of PZT-5H piezoelectric ceramic in contact with viscous liquid is calculated and discussed. Numerical results of attenuation and phase velocity versus viscosity, density of the liquid and wave frequency are presented. The paper is intended to provide essential data for liquid senor design and development.

SH-SAWs in layered Piezoelectric Structures Carrying an Array of Microbeams

“…It is well known that piezoelectric materials are widely used in acoustic wave devices such as sensors, actuators, and transducers for their strong coupling between electric and mechanical constitutive behavior since White invented the interdigital transducers utilized for transmitting and receiving surface acoustic waves in 1965 [5]. There are numerous investigations have been taken on SH-SAWs in piezoelectric media due to their extensive applications [6][7].…”

In-Situ Measurement Via E/M Impedance Spectroscopy Technique Using Shear Horizontal Piezoelectric Wafer Active Sensors

“…The sensors utilizing surface acoustic waves (SAW) are superior to the conventional BAW devices in liquid sensor applications since SAW devices can operate at much higher frequencies and more mass sensitive since SAW possesses large attenuation and energy loss due to a mode conversion in the liquid and dissipates due to the viscous effects [15]. Guo & Sun [19] found that shear type SAW is a good candidate for liquid sensing applications. Other alternative to the SAW presented was the shear horizontal (SH) surface wave as seen in Fig.…”

Propagation of Thickness-Twist Waves in an Infinite Piezoelectric Plate

“…Equivalently, the speed of a propagating wave in a body in contact with a fluid is also affected by the fluid. This effect has been used to make various fluid sensors for measuring fluid viscosity or density (Kanazawa & Gordon, 1985;Josse et al, 1990;Reed et al, 2001;Kim et al, 1991;Vogt et al, 2004;Guo & Sun, 2008;Peng et al, 2006). More references can be found in a review article (Benes et al, 1995).…”

“…For fluid sensor applications, vibration modes of a body without a normal displacement at its surface are of general interest. Thickness-shear and thickness-twist modes in a plate (Kanazawa & Gordon, 1985;Josse et al, 1990;Reed et al, 2001), torsional modes of a circular shaft (Kim et al, 1991;Vogt et al, 2004), and anti-plane surface waves (Guo & Sun, 2008;Peng et al, 2006) are modes with tangential surface displacements only and have been used for fluid sensor applications. To establish the relation between wave frequency and fluid density or viscosity, a coupled problem of fluid-structure interaction needs to be solved.…”