This paper demonstrates the influence of the mutual orientation of the poling direction of single-crystal and ceramic components on the properties of 1-0-3 composites containing two ferroelectric components and a piezo-passive polymer. Effective properties to be considered are hydrostatic piezoelectric performance, anisotropy of squared figures of merit and electromechanical coupling factors. We demonstrate that the elastic and piezoelectric anisotropy of the 0-3 connectivity ferroelectric ceramic/polymer matrix with prolate inclusions leads to large hydrostatic piezoelectric coefficients (dh∗ and gh∗) and squared figure of merit (dh∗gh∗) in a 1-0-3 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystal/(Pb1-xCax)TiO3 ceramic/araldite composite with x = 0.20-0.25. In this type of composite values of maxgh∗ ∼102 mV m/N and max(dh∗gh∗) ∼10-11 Pa-1 are achieved at specific volume-fraction and rotation-angle ranges due to a new orientation effect in the presence of a highly anisotropic 0-3 matrix. Such composites are of interest for sensor, actuator and energy-harvesting applications.
|Number of pages||9|
|Journal||Materials Chemistry and Physics|
|Publication status||Published - 1 Feb 2015|
- Composite materials
- Elastic properties
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- Department of Mechanical Engineering - Professor
- Centre for Sustainable and Circular Technologies (CSCT)
- Centre for Nanoscience and Nanotechnology
- Institute for Mathematical Innovation (IMI)
- Faculty of Engineering and Design - Associate Dean (Research)
- Institute for Sustainability
- Centre for Integrated Materials, Processes & Structures (IMPS)
Person: Research & Teaching, Core staff