Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 709-717 |
| Number of pages | 9 |
| Journal | Microsystem Technologies |
| Volume | 20 |
| Issue number | 4-5 |
| Early online date | 7 Dec 2013 |
| DOIs | |
| Publication status | Published - 30 Apr 2014 |
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2–2 composites based on [011]-poled relaxor-ferroelectric single crystals : Analysis of the piezoelectric anisotropy and squared figures of merit for energy harvesting applications. / Bowen, C. R.; Betts, D. N.; Kim, H. A.; Yu. Topolov, V.
In: Microsystem Technologies, Vol. 20, No. 4-5, 30.04.2014, p. 709-717.Research output: Contribution to journal › Article
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TY - JOUR
T1 - 2–2 composites based on [011]-poled relaxor-ferroelectric single crystals
T2 - Analysis of the piezoelectric anisotropy and squared figures of merit for energy harvesting applications
AU - Bowen, C. R.
AU - Betts, D. N.
AU - Kim, H. A.
AU - Yu. Topolov, V.
PY - 2014/4/30
Y1 - 2014/4/30
N2 - In this paper we explore the effect of the orientation of the main crystallographic axes in relaxor-ferroelectric single crystals (SCs) on the piezoelectric anisotropy and squared figures of merit of 2-2 parallel-connected SC/auxetic polymer composites. The single-crystal component for the composite is chosen from the perovskite-type solid solutions with compositions near the morphotropic phase boundary and poled along the perovskite unit-cell [011] direction (mm 2 symmetry of domain-engineered SCs). The orientation of the main crystallographic axes in the single-crystal component is observed to strongly influence the piezoelectric coefficients d3j* squared figures of merit d3j* g3j* electromechanical coupling factors k3j* and hydrostatic analogs of these parameters of the 2-2 composite. Inequalities | d33*/ d 3f*| > 5 and | k33*/ k3f*| > 5 (f = 1 and 2) are achieved at specific orientations of the main crystallographic axes due to the significant anisotropy of the elastic and piezoelectric properties of the single-crystal component. The use of an auxetic polyethylene (a polymer component with a negative Poisson's ratio) leads to a significant increase in the hydrostatic parameters. Particular advantages of such composites over conventional ceramic/polymer composites are taken into account for transducer, hydroacoustic, energy harvesting, and other applications.
AB - In this paper we explore the effect of the orientation of the main crystallographic axes in relaxor-ferroelectric single crystals (SCs) on the piezoelectric anisotropy and squared figures of merit of 2-2 parallel-connected SC/auxetic polymer composites. The single-crystal component for the composite is chosen from the perovskite-type solid solutions with compositions near the morphotropic phase boundary and poled along the perovskite unit-cell [011] direction (mm 2 symmetry of domain-engineered SCs). The orientation of the main crystallographic axes in the single-crystal component is observed to strongly influence the piezoelectric coefficients d3j* squared figures of merit d3j* g3j* electromechanical coupling factors k3j* and hydrostatic analogs of these parameters of the 2-2 composite. Inequalities | d33*/ d 3f*| > 5 and | k33*/ k3f*| > 5 (f = 1 and 2) are achieved at specific orientations of the main crystallographic axes due to the significant anisotropy of the elastic and piezoelectric properties of the single-crystal component. The use of an auxetic polyethylene (a polymer component with a negative Poisson's ratio) leads to a significant increase in the hydrostatic parameters. Particular advantages of such composites over conventional ceramic/polymer composites are taken into account for transducer, hydroacoustic, energy harvesting, and other applications.
U2 - 10.1007/s00542-013-2012-8
DO - 10.1007/s00542-013-2012-8
M3 - Article
VL - 20
SP - 709
EP - 717
JO - Microsystem Technologies
JF - Microsystem Technologies
SN - 0946-7076
IS - 4-5
ER -