Piezoelectric dispenser based on a piezoelectric-metal-cavity actuator.
Rev Sci Instrum
; 80(7): 075110, 2009 Jul.
Article
em En
| MEDLINE
| ID: mdl-19655984
ABSTRACT
A piezoelectric dispenser has been fabricated based on the idea of a piezoelectric-metal-cavity (PMC) actuator. The PMC actuator consists of a metal ring sandwiched between two identical piezoelectric unimorphs. The radial contraction of the piezoelectric ceramic is converted into a flextensional motion of the unimorph, causing a large flexural displacement in the center part of the actuator. With the PMC actuator as a fluid chamber, the large flexural actuation can be used to produce the displacement needed to eject fluid. By applying an appropriate voltage to the piezoelectric unimorphs, a drop-on-demand ejection of ink or water can be achieved. The efficiency of fluid ejection can be enhanced after installing a valve in the fluid chamber. With the simple PMC structure, the dispenser can be operated with a low driving voltage of 12-15 V.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eletrônica
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article