Lead zirconate titanate

About: Lead zirconate titanate is a research topic. Over the lifetime, 7141 publications have been published within this topic receiving 150878 citations.

High-piezoelectric behavior of c-axis-oriented lead zirconate titanate thin films with composition near the morphotropic phase boundary

Abstract: The piezoelectric responses of c-axis-oriented Pb(Zr0.53Ti0.47)O3 (PZT) thin films have been studied by measuring the stress-induced charge with an accurate charge integrator. These measurements reveal that the c-axis-oriented PZT films have high values of d33, which are several times those of ceramic materials. The intrinsic d33 values of poled films are about 680 and 800 pC/N for the c-axis-oriented films on Si and MgO single-crystal substrates, respectively. It shows that the thin-film deposition technique opens an approach for exploring the potential superior properties of PZT near the morphotropic phase boundary.

Skin-Integrated Graphene-Embedded Lead Zirconate Titanate Rubber for Energy Harvesting and Mechanical Sensing

Abstract: Thin, soft skin-integrated electronics have attracted great attentions due to their advantages such as flexible, lightweight, and mechanical compatible with human body, thus offer unique capabilities in detecting vital information and continuous monitoring human health.[1–8] Recent advances in materials development,[9–15] electronics miniaturization,[16–20] mechanics optimization,[18,21–24] and system-level integration[17,25–28] build up the foundations for flexible and stretchable electronics[29–32] which are able to be integrated together with skin. Considering power supply for this new kind of soft electronics, conversion of mechanical energy from human body activities and motions to electricity is a considerable route.[4,5,13,33,34] Various kinds of technologies, such as piezoelectric,[35–40] triboelectric,[41–47] electromagnetic,[48] and pyroelectric[49–51] have been considered and studied. Among these self-powered technologies, piezoelectric generators have proven to be a great candidate as energy harvesters for skin-integrated or even biointegrated electronics, due to the combination of their excellent electrical properties and advanced mechanical designs.[5,18,52,53] Materials and mechanical engineering in piezoelectric materials, including lead zirconate tinanate (PZT),[1,11,18,19,24,38] PVDF,[20,21,53] BaTiO3, NaNbO3, and ZnO[35,56] have been made great progress and realized outstanding electromechanical properties. However, complicated fabrication processes involving high temperature deposition, multiple steps photolithographs, physical/chemical etchings, and transfer printings are typically needed to meet the requirement of flexibility.[17,18,57–59] To realize rapid and low-cost processing techniques for soft piezoelectric based electronics, inherent flexibility of the materials should be carefully considered, as which affords the possibility for large-area fabrication relevant routes, such as screen-printing and roll to roll technologies.[9] One promising method for realizing inherent flexible piezoelectric materials is designing polymer-matrix composites which typically consist of piezoelectric ceramic powders and silicone rubbers (polydimethylsiloxane, PDMS).[11,15,60–63] This Thin, soft, skin-like electronics capable of transforming body mechanical motions to electrical signals have broad potential applications in biosensing and energy harvesting. Forming piezoelectric materials into flexible and stretchable formats and integrating with soft substrate would be a considerable strategy for this aspect. Here, a skin-integrated rubbery electronic device that associates with a simple low-cost fabrication method for a ternary piezoelectric rubber composite of graphene, lead zirconate tinanate (PZT), and polydimethylsiloxane (PDMS) is introduced. Comparing to the binary composite that blend with PZT and PDMS, the grapheneembedded ternary composite exhibits a significant enhancement of selfpowered behavior, with a maximum power density of 972.43 μW cm−3 under human walking. Combined experimental and theoretical studies of the graphene-embedded PZT rubber allow the skin-integrated electronic device to exhibit excellent mechanical tolerance to bending, stretching, and twisting for thousands of cycles. Customized device geometries guided by optimized mechanical design enable a more comprehensive integration of the rubbery electronics with the human body. For instance, annulus-shape devices can perfectly mount on the joints and ensure great power output and stability under continuous and large deformations. This work demonstrates the potential of large-area, skin-integrated, self-powered electronics for energy harvesting as well as human health related mechanical sensing.

Modeling and experimental validation of unimorph piezoelectric cymbal design in energy harvesting

Abstract: This article presents a unimorph lead zirconate titanate cymbal structure as an energy harvester. The unimorph lead zirconate titanate cymbal harvester was designed to be able to sustain higher mec...

Enhancement of dielectric and ferroelectric properties by addition of Pt particles to a lead zirconate titanate matrix

Abstract: Ferroelectric/metal composites have been characterized for their electric field dependence of the dielectric and ferroelectric properties. The composites show an interesting change of dielectric properties with increasing metal concentration. A relatively high dielectric constant, up to four times as high as that of monolithic lead zirconate titanate (PZT), is observed in the investigated composition range. The dielectric properties are clearly electric field dependent. The tunability of the composite, defined as the difference between the dielectric constant with no applied voltage and the dielectric constant with an applied voltage, divided by the dielectric constant with no applied voltage, was found to be ∼ 17, whilst for the monolithic PZT ceramics it is about 3 only. This offers perspectives for application of these composites in lighting electronics and voltage controllers. Ferroelectric hysteresis measurements on these composites revealed a square-shaped hysteresis loop with remnant polarization comparable with single PZT ceramics, while the coercive field was much lower than that of pure PZT ceramics. This might be interesting for application of these composites as a ferroelectric memory material with decreased switching voltage.

Low-temperature growth of ferroelectric lead zirconate titanate thin films using the magnetic field of low power 2.45 GHz microwave irradiation

Abstract: Pb(Zr(x)Ti(1-x))O(3) (PZT) thin films were coated on Pt/Ti/SiO(2)/Si substrates by the sol-gel method and then crystallized by using the magnetic field of 2.45 GHz microwave irradiation. The elevated temperature generated by microwave irradiation used to obtain the perovskite phase was only 450 degrees C, which is significantly lower than that of conventional thermal processing. The PZT films crystallized by microwave irradiation showed similar ferroelectric properties to those of the films crystallized by conventional thermal processing at 600 degrees C. It is clear that single-mode 2.45 GHz microwave irradiation in the microwave magnetic field is effective for obtaining perovskite PZT thin films at low temperatures. (c) 2008 American Institute of Physics.