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Journal Article

Ultrasonic resonator energy loss determination (chemical kinetics study).

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Eggers,  F.
Abteilung Experimentelle Methoden, MPI for biophysical chemistry, Max Planck Society;

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602995.pdf
(Publisher version), 568KB

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Citation

Eggers, F. (1990). Ultrasonic resonator energy loss determination (chemical kinetics study). Measurement Science and Technology, 1(5), 385-390.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-0DDD-8
Abstract
Ultrasonic resonators are used to study chemical kinetics in liquids (relaxation spectrometry). Resonator loss, proportional to Q-1, is frequently determined from half-power bandwidth (amplitude 3 dB down from peak value); but other methods, in particular those utilising the phase characteristic at resonance, are often advantageous. The author describes three different techniques, employing an AM driving signal for the resonator network, affecting the modulation envelope; a resonance peak compensation (RF amplitude and phase of the output signal); the phase slope (group delay) of the output signal. Relations for the one-dimensional ultrasonic resonator, circuit diagrams and measurement examples are given.