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Power piezo-composite patch transducer uses d33 elongation effect

Power piezo-composite patch transducer uses d33 elongation effect

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By eeNews Europe



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The active layer of the patch transducer consists of a multilayer piezo element embedded in a fibre-reinforced plastic, it can be used as piezo-actuator, sensor or energy harvester. For displacement, the DuraAct Power uses the longitudinal or d33 effect, which describes an elongation parallel to the electric field E and the polarization direction of the piezo actuator.

The d33 piezoelectric deformation coefficients for the longitudinal effect are considerably higher than the d31 coefficients for the transversal effect, consequently the attainable displacement is higher too. A polymer coating simultaneously serves as electrical insulation and as mechanical preload, which makes the P-878 bendable.

Visit PI Ceramic at www.pi.ws

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