Impedance analysis for characterizing the influence of hydrostatic pressure on piezoelectric quartz crystal sensors
Résumé
The effect of hydrostatic pressure on the electrical behavior of quartz crystal resonators vibrating in the megahertz range is investigated by impedance analysis. The responses in frequency and dissipation of five AT-cut polished quartz crystals immersed in helium gas are analyzed and compared from conductance spectra around the resonance on several overtones. A model is then proposed to correlate the variations in frequency and dissipation with pressure and to explain the particular behavior observed on the fundamental harmonic mode.
Mots clés
Conductance spectra
Electrical behaviors
Fundamental harmonic
Helium gas
Impedance analysis
Piezoelectric quartz crystal sensors
Quartz crystal
Quartz crystal resonator Engineering controlled terms: Crystal resonators
Electric impedance
Frequency response
Helium
Hydraulics
Hydrodynamics
Hydrostatic pressure
Piezoelectricity
Quartz Engineering main heading: Pressure effects