Radial Field Piezoelectric Diaphragms
Autor: | Jane M. Hogge, Isaiah Aranda, Ed W. Covington, Robert T. Effinger, Ben M. Copeland, Robert G. Bryant |
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Rok vydání: | 2004 |
Předmět: |
Materials science
Mechanical Engineering Poling Field strength 02 engineering and technology Conical surface 021001 nanoscience & nanotechnology Piezoelectricity Computer Science::Other 020303 mechanical engineering & transports 0203 mechanical engineering Deflection (engineering) Electric field Perpendicular General Materials Science Composite material 0210 nano-technology Voltage |
Zdroj: | Journal of Intelligent Material Systems and Structures. 15:527-538 |
ISSN: | 1530-8138 1045-389X |
Popis: | A series of active piezoelectric diaphragms were fabricated and patterned with several geometrically defined Inter-Circulating Electrodes “ICE” and Interdigitated Ring Electrodes “IRE”. When a voltage potential is applied to the electrodes, the result is a radially distributed electric field that mechanically strains the piezo-ceramic along the Z-axis (perpendicular to the applied electric field). Unlike piezoelectric bender actuators, the Radial Field Diaphragm (RFD) strains concentrically yet affords high displacements without any appreciable XY-strain beyond its perimeter, as both the radial and tangential strain field approach zero at the boundary independent of actuator movement. The result is a Z-axis deflection that has a conical profile. This article covers the fabrication and characterization of these RFDs as a function of poling field strength, ceramic thickness and geometry, electrode type, line spacing, surface topography, the resulting localized strain field and displacement as a function of applied voltage at low frequencies. The unique features of these RFDs are the ability to be clamped about their perimeter with little or no change in displacement, the environmentally insulated packaging and a highly repeatable fabrication process that uses commodity materials. |
Databáze: | OpenAIRE |
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