Comparison of metal-based pzt and pmn–pt energy harvesters fabricated by aerosol deposition method
Journal
Sensors
Journal Volume
21
Journal Issue
14
Date Issued
2021
Author(s)
Abstract
In this study, polycrystalline lead magnesium niobate–lead titanate (PMN–PT) was ex-plored as an alternative piezoelectric material, with a higher power density for energy harvesting (EH), and comprehensively compared to the widely used polycrystalline lead zirconate titanate (PZT). First, the size distribution and piezoelectric properties of PZT and PMN–PT raw powders and ceramics were compared. Thereafter, both materials were deposited on stainless-steel substrates as 10 µm thick films using the aerosol deposition method. The films were processed as {3–1}-mode cantilever-type EH devices using microelectromechanical systems. The films with different annealing temperatures were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and dielectric behavior measurements. Furthermore, the mechanical and electrical properties of PMN–PT-and PZT-based devices were measured and compared. The PMN–PT-based devices showed a higher Young’s modulus and lower damping ratio. Owing to their higher figure of merit and lower piezoelectric voltage constant, they showed a higher power and lower voltage than the PZT-based devices. Finally, when poly-PMN–PT material was the active layer, the output power was enhanced by 26% at the 0.5 g acceleration level. Thus, these devices exhibited promising properties, meeting the high current and low voltage requirements in integrated circuit designs. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Subjects
Aerosol deposition; Energy harvesting; Energy harvesting; Lead magnesium niobate–lead titanate (PMN–PT); Lead zirconate titanate (PZT)
Other Subjects
Aerosols; Deposition; Energy dispersive spectroscopy; Energy harvesting; Lead titanate; Lead zirconate titanate; MEMS; Niobium compounds; Piezoelectricity; Respiratory mechanics; Scanning electron microscopy; Thick films; Aerosol deposition method; Annealing temperatures; Energy dispersive X ray spectroscopy; Lead magnesium niobate; Mechanical and electrical properties; Piezoelectric property; Piezoelectric voltage; Stainless steel substrates; Microelectromechanical devices
Type
journal article