Development and Electromechanical Properties of Multimaterial Piezoelectric and Electrostrictive PMN-PT Monomorph Actuators |
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Authors: | A?Hall M?Allahverdi E?K?Akdogan Email author" target="_blank">A?SafariEmail author |
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Affiliation: | (1) Department of Materials Science and Engineering, Rutgers-The State University of New Jersey, Piscataway, New Jersey, 08854 |
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Abstract: | 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. |
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Keywords: | piezoelectric and electrostrictive PMN-PT monomorph actuators permittivity hysteresis displacement |
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