Piezoelectric actuators employ piezoelectric ceramics, which are deformed (extended or shrunk) under a voltage, and are widely used for positioning devices. 

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Despite their small sizes and low profiles, Murata piezoelectric actuators deliver very usable displacement, helping reduce module size and profile.

Piezo Vibe

Murata Icon X Technical Reference

Basic knowlede of Piezoelectric Actuators

Application Guide of Piezoelectric Actuators

d31 type Actuator / d33 type Actuator