Development and Electromechanical Properties of Multimaterial Piezoelectric and Electrostrictive PMN-PT Monomorph Actuators
| Autor: | Ahmad Safari, Asha Hall, E. K. Akdogan, M. Allahverdi |
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| Rok vydání: | 2005 |
| Předmět: |
Permittivity
Materials science Electrostriction Relative permittivity Dielectric Condensed Matter Physics Piezoelectricity Electronic Optical and Magnetic Materials Hysteresis Mechanics of Materials Materials Chemistry Ceramics and Composites Electrical and Electronic Engineering Composite material Polarization (electrochemistry) Displacement (fluid) |
| Zdroj: | Journal of Electroceramics. 15:143-150 |
| ISSN: | 1573-8663 1385-3449 |
| DOI: | 10.1007/s10832-005-2191-5 |
| Popis: | Monolithic multimaterial monomorphs, comprised of varying ratios of piezoelectric 0.65Pb(Mg1/3 Nb2/3)O3-0.35PbTiO3 to electrostrictive 0.90Pb(Mg1/3Nb2/3)O3-0.10PbTiO3, have been co-fired at 1150∘C. The relative permittivity, displacement, and polarization hysteresis were investigated for varying ratios of piezoelectric to electrostrictive material. The permittivity of the 1:1 multimaterial monomorphs followed the dielectric mixing laws, showing a dielectric constant of 5,500 at room temperature. The P-E hysteresis loop of the 1:1 sample exhibited a maximum and remnant polarization slightly less than the piezoelectric PMN-PT 65/35, but higher than the electrostrictive PMN-PT 90/10. Displacement was found to be higher for the 3:1 monolithic monomorph actuators, reaching 76 μ m at 6 kV/cm. The results indicate that by minimizing the electrostrictive layer thickness the tip displacement can be substantially increased while maintaining a lower hysteresis than that of the purely piezoelectric counterpart. |
| Databáze: | OpenAIRE |
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