Efficient and Unique: DuraActPower Piezo Composite Patch Transducer with Multilayer Ceramics Uses d33 Effect


The new P-878 DuraAct Power piezo patch transducer from PI Ceramic uses an operating voltage of only -20V to 120V, and is the only one of its kind on the market.

As all previousDuraAct transducers, the P-878 can be used as piezo actuator, sensor or energy harvester. The active layer of the patch transducer consists of a multilayer piezo element that is embedded in a fibre-reinforced plastic with a patented method.

For displacement, the DuraAct Power uses the d33 effect.

The composites are manufactured with a bubble-free injection method. Their polymer coating simultaneously serves as electrical insulation and as mechanical preload, which makes the P-878 bendable.

d33 Effect: What IsBehind DuraAct Power?

Previous all-ceramic transducers require high driving voltages of 250V to 1,000V. They use lateral contraction of the piezo element when applying the electrical voltage, the so-called transversal or d31 effect.

In contrast, DuraAct Power multilayer patch transducers use the longitudinal or d33 effect, which describes an elongation parallel to the electric field E and the polarisation 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.

DuraAct Power: composite patch transducer with multilayer ceramics uses efficient d33 effect.

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