Piezoelectric dispenser based on a piezoelectric-metal-cavity actuator.
Rev Sci Instrum
; 80(7): 075110, 2009 Jul.
Article
en 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.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Electrónica
Idioma:
En
Revista:
Rev Sci Instrum
Año:
2009
Tipo del documento:
Article
País de afiliación:
Hong Kong