Fabrication and Characterization of Thickness Mode Piezoelectric Devices for Atomization and Acoustofluidics.
J Vis Exp
; (162)2020 08 05.
Article
em En
| MEDLINE
| ID: mdl-32831306
ABSTRACT
We present a technique to fabricate simple thickness mode piezoelectric devices using lithium niobate (LN). Such devices have been shown to atomize liquid more efficiently, in terms of ï¬ow rate per power input, than those that rely on Rayleigh waves and other modes of vibration in LN or lead zirconate titanate (PZT). The complete device is composed of a transducer, a transducer holder, and a ï¬uid supply system. The fundamentals of acoustic liquid atomization are not well known, so techniques to characterize the devices and to study the phenomena are also described. Laser Doppler vibrometry (LDV) provides vibration information essential in comparing acoustic transducers and, in this case, indicates whether a device will perform well in thickness vibration. It can also be used to ï¬nd the resonance frequency of the device, though this information is obtained more quickly via impedance analysis. Continuous ï¬uid atomization, as an example application, requires careful ï¬uid flow control, and we present such a method with high-speed imaging and droplet size distribution measurements via laser scattering.
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Base de dados:
MEDLINE
Assunto principal:
Acústica
/
Nebulizadores e Vaporizadores
/
Desenho de Equipamento
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article