Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7897780 | Journal of the European Ceramic Society | 2018 | 9 Pages |
Abstract
In this study, we investigated (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 lead-free piezoelectric ceramics for energy harvester applications. The (1-x)BZT-xBCT ceramic is a promising lead-free piezoelectric material in the field of piezoelectric energy harvesting. Piezoelectric and energy properties of (1-x)BZT-xBCT ceramics were analyzed to confirm the possibility of using them as energy-harvesting materials. Especially, the vicinity of the phase convergence region was investigated to improve their piezoelectric properties. In the phase convergence region, cubic, rhombohedral, orthorhombic, and tetragonal regions co-exist within the narrow region. Near the phase transition region between the orthorhombic and tetragonal phase, the highest piezoelectric property d33â¯=â¯464 pC/N and the highest energy density of 158.5 μJ/cm3 were observed. This output energy density of 158.5 μJ/cm3 is the recorded highest value among lead-free ceramics. We found that the optimal sintering temperature was 1475â¯Â°C and the optimal composition was BZT-0.5BCT.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Dong-Jin Shin, Jinhwan Kim, Jung-Hyuk Koh,