LiTaO3 Shear Wave Resonator for Viscosity Measurement of Polymer Liquid in MHz Range

概要

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We are studying the response of a strip-type LiTaO3 shear wave resonator in polymer liquid in MHz range. The element size is small ($1.0\times 7.4\times 0.49$ mm3). The side surfaces of the resonator were covered with a highly viscous silicone rubber material. Using Newton fluid theory, the characteristic mechanical impedance of the shear wave in the liquid was derived for the equivalent circuit of the resonator. The analytical values of glycerin were roughly consistent with the experiment using only 0.1 cm3. The polymer liquid used for the measurement was silicone oil. The static viscosity was from 9.8 to 94,720 mPa$\cdot$s. The resonance frequency change was from 0.05% to 0.07%. The resonance resistance change was from 57 $\Omega$ to 190 $\Omega$. The experiment results were examined using Mason’s equivalent circuit with Maxwell model of a viscoelastic polymer.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2004-05-15