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Piezoelectric actuator for e.g. pneumatic valve, has piezoelectric layer between two electrode layers, where electric field produced in piezoelectric layer produces different expansion states in piezoelectric layer and other layer
Piezoelectric actuator for e.g. pneumatic valve, has piezoelectric layer between two electrode layers, where electric field produced in piezoelectric layer produces different expansion states in piezoelectric layer and other layer
The actuator has a piezoelectric layer (10) arranged between two electrode layers. The two electrode layers are arranged for producing an electric field in the piezoelectric layer. Another layer (20) is arranged at the piezoelectric layer, where the latter layer comprises a material gradient. The electric field produced in the piezoelectric layer produces different expansion states in the piezoelectric layer and the latter layer.
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