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Piezoelectrics Ceramics Properties & Applications Manual


Piezoelectric Actuators - Specifications

Standard Specification
All piezoelectric ceramic multilayer actuators are supplied as assemblies, consisting of the following:
  • "single" or "stacked" actuator
  • protective ceramic end plates for wear resistance and electrical insulation
  • conformal epoxy coating for electrical insulation
  • supplied with insulated copper wire leads
  • Dielectric coating
  • Inactive ceramic insulation layer at top and bottom.

Custom Specifications

  • Actuators with smaller surface areas available
  • Actuators can be epoxied together to achieve greater height and displacement.

We welcome enquiries regarding the feasibility, availability, and price of customised multilayered actuators and bimorphs.

Actuator Custom Specification

(dimensions do not include ceramic end plates and conformal coating)

(displacement under no-load conditions)

 

Type 700 Specifications

  Units 700 37-1
Length L mm 5
Width W mm 5
Diameter mm -
Height H mm 5
Max Displacement (±10%) µm 3.2
Max Blocked Force N 777.0
Elastic Constant YE33 1010N/m2 4.8
Max Operational Frequency kHz 1
Capacitance (±20%, @1V, 1kHz) NF 88.0
Max Response Time µs 100
Max DC Voltage V 200
Max AC Voltage V 200
Curie Temperature °C 190
Max Operating Temperature °C 90
Typical Hysteresis % 10-18

Notes
DC voltage must be applied in the direction of polarization
If actuator is used with AC, apply DC bias which is half the magnitude of the AC signal
Capacitance charge time is based on actuator capacitance and amplifier characteristics
Operational frequency is dependent on drive level

The displacement of a piezoelectric multi-layer actuator varies approximately linearly with applied voltage, so shown in Fig.1. The generated force degrades with displacement. Chart of displacement of a piezoelectric multi-layer actuator fig .1

 
 

Piezoelectric ceramics for displacive transduction fig. 2

 When using piezoelectric ceramics for displacive transduction, consideration must be given to the large hysteresis observed, i.e. the displacement produced as the electric field increases is different to that as the field decreases. If necessary, feedback circuitry can be used to correct for the hysteresis.

Piezoelectric Actuators - Multilayer Actuators

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