SC-Cut Quartz Resonators for Dynamic Liquid Viscosity Measurements

Area of Science:

• Materials Science
• Analytical Chemistry
• Sensor Technology

Background:

• Viscosity measurement is crucial in various industrial and scientific applications.
• Existing resonator-based viscosity sensors face limitations in sensitivity and accuracy.
• Stress compensated (SC)-cut quartz resonators offer potential for improved performance.

Purpose of the Study:

• To develop and validate an innovative viscosity sensor utilizing an SC-cut quartz resonator.
• To analyze the fluid-structure interaction in thickness-shear mode for viscosity sensing.
• To enhance the sensitivity and accuracy of resonator-based viscosity measurements.

Main Methods:

• Theoretical analysis of thickness-shear vibration with fluid loading using 3-D linear piezoelectric equations.
• Derivation and solution of the characteristic equation for sensitivity analysis.
• Experimental validation using a U-tube test fixture with glycerol/water mixtures of varying viscosities.

Main Results:

• Experimental results show strong consistency with the analytical solution.
• The SC-cut quartz resonator sensor exhibits improved sensitivity compared to other resonator-based sensors.
• The sensor accurately measures viscosity across a range of glycerol/water mixtures.

Conclusions:

• The proposed viscosity sensor is sensitive, accurate, and portable.
• It offers a viable solution for real-time, on-site measurement of fluidic samples.
• The SC-cut quartz resonator technology advances the field of viscosity sensing.