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Proceedings Paper

Mechanical energy harvesting utilizing phase transition in 32 mode relaxor-ferroelectric PIN-PMN-PT single crystals
Author(s): Wen Dong; Peter Finkel; Ahmed Amin; Christopher S. Lynch
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Paper Abstract

This work presents experimental evidence of giant electro-mechanical energy conversion under ferroelectric/ferroelectric rhombohedral-orthorhombic phase transformation. Combinations of stress and electric field drive a phase transformation from rhombohedral to orthorhombic in [011] cut ferroelectric single crystals. This phase transformation is accompanied by a large jump in electric displacement and strain. The results indicate that the ferroelectric crystals produce at least an order of magnitude more electrical energy density per cycle that that produced using the linear piezoelectric effect. In the experimental work, energy is harvested from a cyclic drive stress of ~5 MPa applied to a ternary Pb(In1/2Nb1/2)O3- Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) single crystal of composition just at the rhombohedral side of a morphotropic phase boundary. Ideal energy harvesting cycles, experimental electrical and mechanical results, and methods of mechanical confinement and drive are presented.

Paper Details

Date Published: 29 March 2012
PDF: 11 pages
Proc. SPIE 8343, Industrial and Commercial Applications of Smart Structures Technologies 2012, 834308 (29 March 2012); doi: 10.1117/12.917383
Show Author Affiliations
Wen Dong, Univ. of California, Los Angeles (United States)
Peter Finkel, Naval Undersea Warfare Ctr. (United States)
Ahmed Amin, Naval Undersea Warfare Ctr. (United States)
Christopher S. Lynch, Univ. of California, Los Angeles (United States)

Published in SPIE Proceedings Vol. 8343:
Industrial and Commercial Applications of Smart Structures Technologies 2012
Kevin Farinholt; Steven F. Griffin, Editor(s)

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