Engineered Domain Configuration and Piezoelectric Energy Harvesting in 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 Single Crystals

Title
Engineered Domain Configuration and Piezoelectric Energy Harvesting in 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 Single Crystals
Authors
송현철강종윤윤석진정대용
Keywords
ferroelectric materials; crystal growth; domain; compression test; piezoelectric energy harvesting
Issue Date
2012-06
Publisher
Metals and Materials International
Citation
VOL 18, NO 3, 499-503
Abstract
The performance of cantilever piezoelectric energy harvesters using three types of piezoelectric materials, relaxor ferroelectric 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) single crystals oriented along the <110> and <001> directions, and a PZT-based ceramic, were investigated. The <110> and <001> oriented PMN&#8211;PT single crystals, which have a rhombohedral phase and spontaneous polarization along the <111> direction, presented electromechanical coupling factor k31’s of 0.78 and 0.42, respectively. The cantilever-type energy harvester operated by 31 resonance mode generated a larger output power of 1.07 mW for the <110> oriented PMN-PT single crystal compared to those of the other materials. The effective electromechanical coupling factor of the piezoelectric energy harvester with the <110> oriented crystal also reached 0.25, not achievable with the other piezoelectric materials. These results demonstrate that the domain engineering of the piezoelectric single crystals can provide higher design flexibility for a tiny energy harvester.
URI
http://pubs.kist.re.kr/handle/201004/42941
ISSN
15989623
Appears in Collections:
KIST Publication > Article
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