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Title: Role of ZnO nanoparticle doping on depolarization temperature, piezoelectric and energy harvesting properties of lead-free Bi<inf>0.5</inf>(Na<inf>0.84</inf>K<inf>0.16</inf>)<inf>0.5</inf>TiO<inf>3</inf> ceramics
Authors: Supalak Manotham
Pichitchai Butnoi
Pharatree Jaita
Doldet Tantraviwat
Narongdetch Boothrawong
Gobwute Rujijanagul
Keywords: Engineering
Materials Science
Physics and Astronomy
Issue Date: 1-Aug-2020
Abstract: © 2020 Elsevier Ltd The effects of ZnO nanoparticle doping on the phase formation, phase transition, dielectric, ferroelectric, piezoelectric, and energy harvesting properties of Bi0.5(Na0.84K0.16)0.5TiO3/xZnO or BNKT16/xZnO (with x = 0, 0.02, 0.04, and 0.06 mol fraction) were investigated. The samples were synthesized through a solid-state reaction method. X-ray diffraction results showed that all samples exhibited a single perovskite phase, except the x = 0.06 sample. The depolarization temperature (Td) value, determined by the thermally stimulated depolarization current (TSDC), tended to vanish with increasing ZnO content. The additive also promoted a diffuse transition at Td. High polarization was observed for the x = 0.04 sample: remanent polarization (Pr) = 53.33 μC/cm2 and saturation polarization (Ps) = 55.34 μC/cm2 with large improvements for Pr and Ps values (98 % and 92 %, respectively, as compared to the base composition) and a decrease in the coercive field (Ec). Improvements of piezoelectric coefficients (d33 and g33) were also found for the x = 0.04 sample. This therefore produced an improvement of energy harvesting performance across the samples.
ISSN: 00255408
Appears in Collections:CMUL: Journal Articles

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