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Piezoelectric Properties of Lead‐free Piezoelectric Ceramics and Their Energy Harvester Characteristics
Author(s) -
Seo InTae,
Choi ChangHoi,
Song Daniel,
Jang MinSoo,
Kim BoYun,
Nahm Sahn,
Kim YoungSik,
Sung TaeHyun,
Song HyunCheol
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12227
Subject(s) - ceramic , piezoelectricity , figure of merit , materials science , composite material , dimensionless quantity , dielectric , energy harvesting , power density , power (physics) , optoelectronics , thermodynamics , physics
The energy convergence efficiency (η) and dimensionless figure of merit ( DFOM ) of CuO ‐added ( Na 0.5 K 0.5 ) NbO 3 ( CNKN ) ceramics are larger than those of NKN ceramics because of their large Q m values and small dielectric losses. Moreover, the η and DFOM values of CNKN ceramics are comparable to those of P‐5C ceramics, which exhibit the highest η and DFOM . Furthermore, the CNKN harvester exhibits a high power density of 12 mW/cm 3 at 93 Hz with a load resistance of 250 kΩ; this is similar to the PZT ‐based energy harvester, indicating that the CNKN ceramic is a good candidate material for energy harvesters.