In this study, new impedance measurement techniques are developed specially for structural health monitoring of large-scale structures. Electromechanical (EM) impedance based damage detection techniques, which utilize the electromechanical coupling effect between a piezoelectric transducer such as lead zirconate titanate (PZT) and a host structure, have been shown to be very sensitive to local ...

Fiber reinforced polymeric composites can be employed for the construction of structures that are highly durable and easy to fabricate. At EMPA, a prototype footbridge with girders and deck made of pultruded composite sections has been designed and constructed. For thin-wall pultruded sections such as I-beam or T-beam, delaminations can form easily at the web/flange junction. If the delaminatio...

The effect of MnO2 addition on the microstructural evolution and piezoelectric properties of low temperature sinterable PZT–PZN ceramics was investigated. When a small amount of MnO2 (≤0.5 wt% ) was added, the Mn ions were homogeneously dissolved in the PZT– PZN ceramics, leading to full densification at a temperature as low as 930 °C. However, the further addition of MnO2 hindered the densific...

The study aimed at determining the effect of acid modified porcine mucin powder on the release and permeation of insulin in transdermal patches. Various batches of insulin patches were prepared by solvent casting method using polysorbate 80 as emulsifying agent and acid treated and untreated mucin powders as base. The patches were evaluated for their physical properties, folding endurance, moi...

Breathing monitoring is important in the health and sports area. In this paper, a wireless self-powered system for breathing designed using piezoelectric devices buckled n-shape L-shape structure. A cotton belt used to tie chest deliver force stimulated by cavity enlargement caused breathing, which can be collected measured based on three-dimension Three hard lead zirconate titanate (PZT) patch...

Automation ProTune, ProTune-PZT/OneNMR probe support Improved and unified support of ProTune and ProTune-PZT is provided. This includes automatically setting the RF phase with a reboot of the console. Other enhancements also include increased sensitivity of tuning data averaging; added phase correction for propagation delay in the probe; enhanced status reporting; better handling of exceptional...

Magnetoelectric coupling effect of Ni1-xZnxFe2O4/PZT (NZFO/PZT) thin film heterostructures is investigated by tuning the Zn content in NZFO film. The highest magnetoelectric coefficient NZFO/PZT achieved at x=0.15 with value 328 mV/cm Oe. This various different induced distinct magnetostriction film, which related to piezomagnetic q and initial permeability μi layer, as well exchange interactio...

Abstract The use of an identical electrolyte in electrochemical metallization (ECM)-based neuron and synaptic devices has not yet been achieved due to their different resistive-switching characteristics. Herein, we describe ECM comprising the same ferroelectric PbZr 0.52 Ti 0.48 O 3 (PZT) electrolyte, which can sustain both behavior depending on identity active electrode. Ag/PZT/La 0.8 Sr 0.2 M...

An approach of Green’s function is adopted to solve the inhomogeneous linear differential equations representing wave equations in piezo-composite materials. In particular, transference of horizontally polarised shear (SH) waves is considered in bedded structure comprising of porous-piezo electric layer lying over a heterogeneous half-space. Propagation of SH-waves is considered to be influence...