Improved pyroelectric figures of merit of Mn-doped Zr-rich lead zirconate titanate bulk ceramics near room temperature for energy harvesting applications

2019 ◽  
Vol 779 ◽  
pp. 450-455 ◽  
Author(s):  
Xuefeng Chen ◽  
Shiguang Yan ◽  
Hengchang Nie ◽  
Fei Cao ◽  
Genshui Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Room Temperature ◽  
Lead Zirconate ◽  
Figures Of Merit ◽  
Zirconate Titanate ◽  
Mn Doped

An experimental study on piezoelectric energy harvesting from wind and ambient structural vibrations for wireless structural health monitoring

2019 ◽  
Vol 23 (5) ◽  
pp. 1010-1023 ◽  
Author(s):  
Naveet Kaur ◽  
Dasari Mahesh ◽  
Sreenitya Singamsetty
Keyword(s):  
Structural Health Monitoring ◽  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Health Monitoring ◽  
Lead Zirconate ◽  
Piezoelectric Energy Harvesting ◽  
Structural Vibrations ◽  
Ambient Wind ◽  
Piezoelectric Energy ◽  
Zirconate Titanate

Energy harvesting is an emerging technology holding promise of sustainability amid the alarming rate at which the human community is depleting the natural resources to cater its needs. There are several ways of harvesting energy in a renewable fashion such as through solar, wind, hydro-electric, geothermal, and artificial photosynthesis. This study focuses on energy harvesting from wind vibrations and ambient structural vibrations (such as from rail and road bridges) through piezo transducers using the direct piezoelectric effect. First, the potential of the piezoelectric energy harvesting from ambient wind vibrations has been investigated and presented here. Lead zirconate titanate patches have been attached at the fixed end of aluminum rectangular and trapezoidal cantilevers, which have been exposed to varying wind velocity in a lab-size wind tunnel. The effect of perforations and twisting (distortion) on the power generated by the patches under varying wind velocity has also been studied. It has been observed that the power is comparatively higher in rectangular-shaped cantilever than the trapezoidal one. Perforations and shape distortion showed promising result in terms of higher yield. The laboratory experiments have also been extended to the real-life field condition to measure the actual power generated by the lead zirconate titanate patches under the ambient wind vibrations. Next, energy harvesting from the ambient structural vibrations has been done both experimentally and numerically. Four different prototypes have been considered. The power has been measured across the lead zirconate titanate patches individually and in parallel combination. A maximum power output for Prototype 1 to Prototype 4 has been found to be 4.3428, 11.844, 25.97, and 43.12 µW, respectively. Numerical study has also been carried out in ANSYS 14.5 to perform the parametric study to examine the effect of addition of mass at the free end of cantilever. In a nutshell, this article provides a comprehensive study on the effect of various factors on the amount of energy generated by piezoelectric patches under wind and structural vibrations. The energy generated is sufficient for driving low-power-consuming electronics that can further be used for other applications like wireless structural health monitoring, and so on.

Contribution of structural order–disorder to the room-temperature photoluminescence of lead zirconate titanate powders

2007 ◽  
Vol 127 (2) ◽  
pp. 689-695 ◽  
Author(s):  
Marcos Anicete-Santos ◽  
Margarete S. Silva ◽  
Emmanuelle Orhan ◽  
Marcio S. Góes ◽  
Maria A. Zaghete ◽  
...  
Keyword(s):  
Lead Zirconate Titanate ◽  
Room Temperature ◽  
Lead Zirconate ◽  
Room Temperature Photoluminescence ◽  
Structural Order ◽  
Zirconate Titanate

Mechanical energy harvesting using polyurethane/lead zirconate titanate composites

2017 ◽  
Vol 52 (9) ◽  
pp. 1171-1182 ◽  
Author(s):  
Abdelkader Rjafallah ◽  
Abdelowahed Hajjaji ◽  
Fouad Belhora ◽  
Daniel Guyomar ◽  
Laurence Seveyrat ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Lead Zirconate Titanate ◽  
Microelectromechanical Systems ◽  
Volume Fraction ◽  
Mechanical Energy ◽  
Mechanical Strain ◽  
Lead Zirconate ◽  
Inorganic Materials ◽  
Zirconate Titanate ◽  
Electromechanical Transduction

The microelectromechanical systems invade gradually the market with applications in many sectors of activity. Developing these micro-systems allows deploying wireless sensor networks that are useful to collect, process and transmit information from their environments without human intervention. In order to keep these micro-devices energetically autonomous without using batteries because they have a limited lifespan, an energy harvesting from ambient vibrations using electrostrictive polymers can be used. These polymers present best features against inorganic materials, as flexibility and low cost. The aims of this paper are manifold. First of all, we made elaboration of the polyurethane/lead zirconate titanate films of 100 µm thickness using a lead zirconate titanate–volume fraction of [Formula: see text]%. Therefore, we did an observation of the lead zirconate titanate grains dispersion and the electrical characterization of the polyurethane–50 vol% lead zirconate titanate composites. Finally, a detailed study of the electromechanical transduction, for the polyurethane–50 vol% lead zirconate titanate unpolarized and polarized composites sustained to the sinusoidal mechanical strain with amplitude of 1.5% and at very low frequencies ( f = 2 [Hz] and f = 4 [Hz]) and static electric field ( Edc = 10 [ V/µm]) or without it ( Edc = 0 [ V/µm]) has been presented.

Pyroelectricity versus conductivity in soft lead zirconate titanate (PZT) ceramics

2007 ◽  
Vol 22 (12) ◽  
pp. 3448-3454 ◽  
Author(s):  
Talal M. Kamel ◽  
G. de With
Keyword(s):  
Electric Fields ◽  
Lead Zirconate Titanate ◽  
Room Temperature ◽  
Vacancy Concentration ◽  
Lead Zirconate ◽  
Pyroelectric Coefficient ◽  
Displacement Current ◽  
Electrical Behavior ◽  
Pzt Ceramics ◽  
Zirconate Titanate

The electrical behavior of modified soft lead zirconate titanate (PZT) ceramics has been studied as a function of temperature at different direct current (dc) electric fields and grain sizes. As ferroelectrics, such as PZT, are highly polarizable materials, poling, depolarization, and electric conduction contribute to the total electrical current, which leads to anomalous electrical behavior as a function of temperature. The PZT appeared to have a high pyroelectric coefficient, and it was found that the displacement current hides the conduction current near room temperature. The (long-time) steady-state electrical resistivity of the soft PZT used has a typical, relatively high value of 3.6 × 1012 Ω·cm near room temperature. The resistivity above the Curie temperature was two orders of magnitude lower than the room temperature. The resistivity decreases with increasing grain size probably due to the increased Pb vacancy concentration resulting as a consequence of a higher sintering temperature. The values of activation energies suggest that the charge carriers at high temperature are mainly oxygen vacancies. At intermediate temperature, the electrical behavior is controlled by the counteracting effect of depolarization and conduction. Considering the pyroelectric effect and the conduction, it was thus possible to explain the electrical behavior of this soft PZT ceramic over the temperature range considered.

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