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Closed Access item X-cut quartz crystal impedance meter for liquid characterization

Authors:Resa, Pablo
Sierra, Carlos
Elvira Segura, Luis
Keywords:Acoustic impedance, Density, Sound velocity, Liquid characterization, Piezoelectric crystal, X-cut quartz, QCM
Issue Date:Feb-2011
Publisher:Institute of Physics Publishing
Citation:Measurement Science and Technology 22(2): 025403 (2011)
Abstract:A new procedure to determine the compressional acoustic impedance of liquids within ±0.05% resolution and ±0.25% accuracy is presented. This method is based on the measurement of the bandwidth of a piezoelectric transducer, vibrating in thickness-expansion mode and having a high quality factor (e.g., air-backed X-cut quartz crystal), in direct contact with the sample. In combination with other ultrasonic techniques (pulse-echo or through-transmission), it is possible to simultaneously obtain the main ultrasonic parameters (characteristic acoustic impedance, speed of sound and attenuation coefficient), and deduce important physicochemical properties of liquids, such as density and adiabatic compressibility. Experimental results for selected liquids and solutions are shown.
Description:8 páginas, 10 figuras, 2 tablas.
Publisher version (URL):http://dx.doi.org/10.1088/0957-0233/22/2/025403
Appears in Collections:(CAEND) Artículos

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