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Characterization of Piezoelectric Ceramic Transducer for Accurate speed-of-Spound Measurement

Published

Author(s)

Keith A. Gillis, Jintao Zhang, H. Lin

Abstract

In this paper, the piezoelectric ceramics mounted on the endplates of a cylindrical resonator were used as the source and detector for acoustic speed measurements. The perturbations of the longitudinal gas modes of the cavity due to the compliance of the diaphragms (10 mm diameter, 0.3 mm thick) and the attached transducers were estimated from first-order perturbation theory. The estimated fractional shifts of the resonance frequencies in argon caused by the source and detector were 0.7 × 10-6 at 0.1 MPa and 273.16 K. The high signal-to-noise ratio (up to 1 × 104) we obtained with these transducers makes them suitable for acoustic thermometry. Heat generated by dissipation in transducers is an important consideration. The dissipation that we measured in the source transducer was only 0.7 microwatts at the working voltage (7 V) and frequency (1 kHz).
Proceedings Title
4th International Workshop on Progress in Determining the Boltzmann Constant
Volume
31
Conference Dates
September 22-24, 2009
Conference Location
Torino

Keywords

Boltzmann constant, acoustic thermometry, resonator, piezoelectric ceramic, PZT, dissipation

Citation

Gillis, K. , Zhang, J. and Lin, H. (2010), Characterization of Piezoelectric Ceramic Transducer for Accurate speed-of-Spound Measurement, 4th International Workshop on Progress in Determining the Boltzmann Constant, Torino, -1, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904670 (Accessed April 14, 2024)
Created July 30, 2010, Updated February 19, 2017