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Piezoelectric Buzzer Optimization for Micropumps

A. Garcia1 A. Marcus1 F. Tejo1 C. Precker1 C. Moreira2
1Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
2Instituto Federal de Alagoas, Maceio, AL, Brazil

Simulation result for the displacement of the piezoelectric actuator. The maximum amplitude of the displacement occurs in the centered actuator

Piezoelectric buzzers are low cost devices which can be used successfully as actuators in diaphragm-based micro-pumps. The buzzers are piezoelectric wafers (lead-zirconate-titanate-PZT) that are glued on a brass membrane and they are available within different sizes and thicknesses. For the best performance of a diaphragm pump, it is necessary to have a large displacement of the membrane. This can be achieved by obtaining the best relationships among the thicknesses and diameters, and types of PZT and membrane, which maximize the displacement of the actuator.

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