Abstract
High piezoelectric sensitivity and large hydrostatic parameters are discussed for two 1-3-type single crystal/auxetic polymer composites. The single crystal components selected are based on lead-free (K,Na)(Nb,Ta)O3 and (Li,K,Na)(Nb,Ta)O3 solid solutions, and the auxetic polymers are characterised by Poisson's ratios -0.83 ≤ v ≤ -0.29. The composites examined exhibit advantageous properties over conventional lead-based piezo-active composites and ceramics such as high longitudinal piezoelectric coefficient g33∗∼(102-103) mV · m/N, squared figure of merit (Q33∗)2∼10-11 Pa-1, hydrostatic piezoelectric coefficient gh∗∼(102-103) mV · m/N and squared figure of merit (Qh∗)2∼(10-11-10-10) Pa-1. The composites also demonstrate an infinitely large anisotropy of piezoelectric coefficients d3j∗.
Original language | English |
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Pages (from-to) | 265-268 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 142 |
Early online date | 10 Dec 2014 |
DOIs | |
Publication status | Published - 1 Mar 2015 |
Keywords
- Composite materials
- Elastic properties
- Ferroelectrics
- Piezoelectric materials
- Polymers