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 |
Bibliographical note
Funding Information:This research was financially supported by the Fusion Research Program for Green Technologies through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2011-0000001) and a grant from the Korea Institute of Science and Technology (2E22731). One of the authors (D. Jeong) thanks the financial support of an NRF grant funded by the Korea government (MEST), No. 2009-0076889 & 2011-0010905.
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