Print Email Facebook Twitter Modeling and characterization of dielectrophoretically structured piezoelectric composites using piezoceramic particle inclusions with high aspect ratios + Erratum Title Modeling and characterization of dielectrophoretically structured piezoelectric composites using piezoceramic particle inclusions with high aspect ratios + Erratum Author Van den Ende, D.A. Maier, R.A. Van Neer, P.L.M.J. Van der Zwaag, S. Randall, C.A. Groen, W.A. Faculty Aerospace Engineering Department Aerospace Structures & Materials Date 2013-01-15 Abstract In this work, the piezoelectric properties at high electric fields of dielectrophoretically aligned PZT—polymer composites containing high aspect ratio particles (such as short fibers) are presented. Polarization and strain as a function of electric field are evaluated. The properties of the composites are compared to those of PZT-polymer composites with equiaxed particles, continuous PZT fiber-polymer composites, and bulk PZT ceramics. From high-field polarization and strain measurements, the effective field dependent permittivity and piezoelectric charge constant in the poling direction are determined for dielectrophoresis structured PZT-polymer composites, continuous PZT fiber-polymer composites, and bulk PZT ceramics. The changes in dielectric properties of the inclusions and the matrix at high fields influence the dielectric and piezoelectric properties of the composites. It is found that the permittivity and piezoelectric charge constants increase towards a maximum at an applied field of around 2.5-5?kV/mm. The electric field at which the maximum occurs depends on the aspect ratio and degree of alignment of the inclusions. Experimental values of d33 at low and high applied fields are compared to a model describing the composites as a continuous polymer matrix containing PZT particles of various aspect ratios arranged into chains. Thickness mode coupling factors were determined from measured impedance data using fitted equivalent circuit model simulations. The relatively high piezoelectric strain constants, voltage constants, and thickness coupling factors indicate that such aligned short fiber composites could be useful as flexible large area transducers. Erratum published 5 March 2015: http://dx.doi.org/10.1063/1.4914113 Subject dielectric polarisationinclusionslead compoundsorganic-inorganic hybrid materialspermittivitypiezoceramicspiezoelecticitypolymers To reference this document use: http://resolver.tudelft.nl/uuid:40251492-8b43-4553-bae5-9f036203fde4 DOI https://doi.org/10.1063/1.4775815 Publisher American Institute of Physics ISSN 0021-8979 Source https://doi.org/10.1063/1.4775815 Source Journal of Applied Physics, 113 (3), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Institute of Physics Files PDF vanderZwaag_2013.pdf 1.23 MB PDF Erratum.pdf 486.89 KB Close viewer /islandora/object/uuid:40251492-8b43-4553-bae5-9f036203fde4/datastream/OBJ1/view