Multi-layer piezoelectric ceramics actuator
A piezoelectric ceramic and actuator technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc. question
Pending Publication Date: 2019-02-26
SUZHOU PANT PIEZOELECTRIC TECH
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Problems solved by technology
The existing technology mainly optimizes the elasticity of the structure of the multilayer piezoelectric ceramic actuator or adds corresponding devices, but the above method does not take into account the high electric field strength and certain environmental humidity of the multilayer piezoelectric ceramic actuator. , temperature, and low or insufficient cleanliness can cause device failure
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[0026] Multi-layer piezoelectric ceramic actuators are widely used, and their reliable and safe operation is very important for production and life. In view of the fact that multi-layer piezoelectric ceramic actuators are composed of multilayer stacks of piezoelectric materials, the multi-layer piezoelectric ceramic actuators are highly A displacement or force will be formed in the direction, which requires a certain amount of elastic elongation of the external electrode.
[0027] After investigation, it was found that the existing technology mainly optimizes the elasticity of the structure of the multilayer piezoelectric ceramic actuator or adds corresponding devices, but the above method does not take into account the high electric field strength of the multilayer piezoelectric ceramic actuator when it is in use. Certain ambient humidity, temperature, and low or insufficient cleanliness can cause device failure.
[0028] Based on the above research, an embodiment of the pres...
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Abstract
The embodiment of the invention relates to technical field of components and parts, especially to a multi-layer piezoelectric ceramics actuator. The multi-layer piezoelectric ceramics actuator comprises internal electrodes, a piezoelectric ceramic body, external electrodes, a flexible electrode layer, a flexible encapsulating layer and an evaporation encapsulating layer. The internal electrodes are alternately arranged at the internal portion of the piezoelectric ceramic body, the external electrodes are arranged at the external portion of the piezoelectric ceramic body and are electrically connected with the internal electrodes, and the external electrodes are not in mutual contact. The flexible electrode is arranged at the outer layers of the external electrodes. The flexible encapsulating layer is arranged at the outer layer of the flexible electrode layer. The evaporation encapsulating layer is arranged at the outer layer of the flexible encapsulating layer and coats the whole piezoelectric ceramic body. The multi-layer piezoelectric ceramics actuator employs the flexible electrode layer, the flexible encapsulating layer and the evaporation encapsulating layer arranged at the outer layer of the piezoelectric ceramic body to effectively perform antifouling and proof damp and improve the stability and the reliability of the work of the multi-layer piezoelectric ceramics actuator.
Description
technical field [0001] The present invention relates to the technical field of components, in particular to a multilayer piezoelectric ceramic actuator. Background technique [0002] Multilayer piezoelectric ceramic actuators are widely used in fields such as precision mechanics and mechanical engineering, life sciences, medicine and biology, pneumatic / hydraulic valves, nanopositioning / high-speed switches, and active and adaptive optics. The safe and reliable use of piezoelectric ceramic actuators plays an important role in production and life. In view of the fact that the multilayer piezoelectric ceramic actuator is composed of a multilayer stack of piezoelectric materials, the multilayer piezoelectric ceramic actuator will form displacement or force in the height direction during operation, which requires the external electrode to have a certain amount of elastic elongation . The prior art mainly optimizes the elasticity of the structure of the multi-layer piezoelectric ...
Claims
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IPC IPC(8): H01L41/047H01L41/053H10N30/87H10N30/88
CPCH10N30/872H10N30/883
Inventor 丁耀民王晓峰
Owner SUZHOU PANT PIEZOELECTRIC TECH