Abstract
Lead lanthanum zirconate titanate actuators taken as one type of photo-deformable actuators have been widely applied for micro-driven systems and active vibration control of photostrictive laminated flexible structures. However, the slow response of photodeformation of single patch lead lanthanum zirconate titanate actuator greatly affects its application. In this article, the main factors for the slow response of the lead lanthanum zirconate titanate actuator are investigated using experimental method. The increasing temperature during light on state and the residual photovoltage and photodeformation during light off state are considered as dominant factors causing the slow response of the lead lanthanum zirconate titanate actuator. To gain a better driving capability of lead lanthanum zirconate titanate actuator, some effective solutions through weakening the effect of increasing temperature and eliminating residual photovoltage and photodeformation are proposed and experimentally validated in this article. Considering the effective solutions proposed in this article, a novel optical driving mechanism based on multi-patches combination is proposed.
Highlights
When the lead lanthanum zirconate titanate (PLZT) ceramic is irradiated by the ultraviolet (UV) light, the photovoltage and photodeformation are generated due to the anomalous photovoltaic effect and photostrictive effect
PLZT ceramic patches can be taken as the optical and wireless control actuators applied in microelectro-mechanical system (MEMS) and micro-optoelectro-mechanical system (MOEMS)
The photodeformation, photovoltage, and temperature of single patch of PLZT ceramic were experimentally investigated during UV light on/off states
Summary
When the lead lanthanum zirconate titanate (PLZT) ceramic is irradiated by the ultraviolet (UV) light, the photovoltage and photodeformation are generated due to the anomalous photovoltaic effect and photostrictive effect. PLZT ceramic shows many advantages for the micro-actuation and wireless remote control field. PLZT ceramic patches can be taken as the optical and wireless control actuators applied in microelectro-mechanical system (MEMS) and micro-optoelectro-mechanical system (MOEMS). Over the last several decades, much research on PLZT ceramics has been published. Varieties of optical micro-devices using PLZT ceramics were proposed, for example, photo-driven micro-walking machines,1,2 ‘‘sunflower’’ device,[3] photo-driven relay,[4] electrostaticoptical motor,[5] photo-driven gripper,[6,7] and photophone device.[8] a large number of PLZT actuators were proposed, such as rainbow
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