In this paper, we develop nonlinear constitutive equations and resulting system models quantifying the nonlinear and hysteretic field-displacement relations inherent to piezoceramic elements employed in present nanopositioner designs. We focus specifically on piezoceramic rods utilizing d33 motion and piezoceramic shells driven in d31 regimes, but the modeling framework is sufficiently general ...

Lead-free Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-0.5BCT) ceramics have drawn attention in recent years because of their outstanding dielectric and electromechanical properties, such as a piezoelectric coefficient d33 ? 620 pC N?1 large signal d33* 1100 pm V?1 at 0.5 kV mm?1 room temperature (RT). These particular properties are relevant to range applications. However, the structural origin t...

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...

In this work, pellet samples of barium calcium zirconate titanate (Ba1-xCaxZr0.1Ti0.9O3, x=0.065) were prepared using solid state reaction route with double sintering. The structural and piezoelectric properties measured. Further, SEM EDAX analysis observed. With different sintering temperature, the density grain size changed further, their effect in has been For samples, converse constant (d33...

Novel ferromagnetic-dielectric particulate composites of Ni0.5Zn0.5Fe1.95O4−δ (NZF) and PbZr0.52Ti0.48O3 (PZT) were prepared by conventional ceramic method. The presence of two phases in composites was confirmed by XRD technique. The variations of dielectric constant (ε) with frequency in the range of 100 kHz–1MHz at room temperature and also with temperature at three different frequencies (50 ...

We develop a model with finite number of multiproduct firms together continuum single-product and study the dynamics that arise from product innovation. Consistent available evidence, predicts rising markups concentration declining labor share. Our predict possibility an inverted-U relationship between productivity span, for which we provide suggestive evidence. In optimal allocation, span are ...