Characterisation of Ferroelectric Bulk Materials and Thin Films by Markys G. Cain

Author:Markys G. Cain
Language: eng
Format: epub
Publisher: Springer Netherlands, Dordrecht

Fig. 28Actuator beam model including temperature variation. Unipolar cycles ON and OFF positions for different expansion substrates

Model results based on ceramic expansion data at room temperature are shown in Fig. 27 for a 25 mm 5 mm composite beam comprising 0.15 mm thickness of PZT, and 0.15 mm thickness of Kovar. for unipolar loops the predicted deflection is just under 0.7 mm. This is close to the values measured for actuators of these dimensions. These results demonstrate how ceramic based strain measurements can be used to obtain realistic predictions of real actuator behaviour.

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