A significant influence of the molecular weight on dielectric properties and piezoelectric constant poly(vinylidene fluoride) (PVDF) membranes obtained by electrospinning was demonstrated. Electrochemical impedance spectroscopy d33 meter were used to evaluate respectively. The presence β-phase determined Fourier transform infrared (FTIR) X-Ray diffraction (XRD). with lowest (180,000 g/mol) poss...

Complement-dependent cytotoxicity in tumor bearer sera (TBS) from Wistar rats carrying any of five transplantable aminoazo dye-induced hepatomas (D23, D33, D23/Not, D30, or D202) were investigated by a short-term 51Cr release assay. Extensive tests of various TBS against the hepatomas revealed that the tumors could be divided into two groups. Group 1 hepatomas (D23, D33, and D23/Not) all shared...

Self-switching diodes (SSD) were fabricated at the wafer level on a 2D few-layer MoS2 thin film (7 monolayers) grown 4-inch Al2O3/high-resistivity silicon via Chemical Vapor Deposition (CVD). We report here that behaves as transparent piezoelectric material in near infrared spectral region and strain-induced ferroelectric with measured d33 coefficient of 3–10 pm/V depending applied AC voltage. ...

In this work, we present the impact of using Na2CO3 as a sintering aid and grain growth agent on crystal structure, microstructure, piezoelectric properties (Bi0.5Na0.5)TiO3 ceramics. The addition leads to substantial increase in size density even at reduced temperature 1025 °C. However, same time, value constant d33 drops dramatically. Using high-resolution x-ray diffraction analysis, demonstr...

In this study, the effects of sintering temperature on microstructure, dielectric and piezoelectric properties are investigated for non-stoichiometric (Na0.48K0.473Li0.04Sr0.007)(Nb0.883Ta0.05Sb0.06Ti0.007)O3 (NKLNTSST) ceramics. The results suggest that enhanced owing to more normal ferroelectric characteristics, higher density, uniform grains presence polymorphic phase transition regions, whi...

s of 2007 Conference on Implantable Auditory Prostheses, July 15–20,

We study in this work the processing of NaNbO3 ceramics prepared in a single thermal treatment of highly reactive precursors obtained by mechanical activation of different reagents, aiming to determine optimum conditions for piezoelectric ceramics production. Pressure-less sintering at 1200oC leads to dense ceramics (<5% porosity) with poor mechanical stability, unsuitable for practical uses. D...

Recently it was found that in the lead-free (1-x)BaZr0.2Ti0.8O3-xBa0.7Ca0.3TiO3 (BZT-xBCT) system, the highest piezoelectric d33 coefficient appears at the tetragonal (T) - orthorhombic (O) phase boundary rather than the O - rhombohedral (R) phase boundary, but the physical origin of it is still unclear. In this work we construct the phase diagram of the BZT-xBCT system using a generic sixth-or...