Abstract
The performance of cantilever piezoelectric energy harvesters using three types of piezoelectric materials, relaxor ferroelectric 0.7Pb(Mg 1/3Nb2/3)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-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.
Original language | English |
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Pages (from-to) | 499-503 |
Number of pages | 5 |
Journal | Metals and Materials International |
Volume | 18 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2012 Jun |
Keywords
- Compression test
- Crystal growth
- Domain
- Ferroelectric materials
- Piezoelectric energy harvesting
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry