Polymer–nanoparticle composites prepared using a low-density polyethylene (LDPE) matrix with BaTiO3 nanoparticle compositions of 6, 9, 12, and 15 wt % have shown insulating behavior are evaluated for their applicability as flexible strain sensors. With increasing percentage the nanoparticles, LDPE crystallinity decreased from 38.11 to 33.79% maximum electrical displacement response was seen inc...

Flexible, light weight and low cost electroactive coating has been fabricated by the dispersion of inorganic ferroelectric submicron particles in a polyurethane matrix. BaTiO3 particles have a mean diameter of 300 nm. The poling process and the influence of volume fraction of BaTiO3 on the piezoelectric activity of the coating have been reported. This spray coating has been realized on 1.6× 1.6...

We report conduction measurements on the clean, free surface of transparent insulating BaTiO3 single crystals in high vacuum. We find that the insulating BaTiO3 crystals exhibit surface conductance that is dependent on the spontaneous polarization, whereas no conduction perpendicular to the surface is observed. The surface conduction shows semimetallic temperature dependence and persists down t...

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Using path-integral Monte Carlo simulations and an ab initio effective Hamiltonian, we study the effects of quantum fluctuations on structural phase transitions in the cubic perovskite compounds SrTiO3 and BaTiO3 . We find quantum fluctuations affect ferroelectric ~FE! transitions more strongly than antiferrodistortive ~AFD! ones, even though the effective mass of a single FE local mode is larg...

We have developed a simple, cost-effective, and scalable approach to fabricate a piezoelectric nanogenerator (NG) with stretchable and flexible characteristics using BaTiO3 nanotubes, which were synthesized by the hydrothermal method. The NG was fabricated by making a composite of the nanotubes with polymer poly(dimethylsiloxane) (PDMS). The peak open-circuit voltage and short-circuit current o...

Composite polymer electrolyte (CPE) membranes, comprising poly (vinylidene fluoride) (PVdF)/poly (methyl methacrylate) (PMMA), BaTiO3 as ceramic filler and LiBF4 as the lithium salt were prepared using a solution casting technique. The prepared membranes were subjected to XRD, FT-IR, impedance spectroscopy and thermal stability studies. The incorporation of nanofiller greatly enhanced the ionic...

We report electron paramagnetic resonance measurements on BaTiO3, containing a dilute impurity of Fe , in its ferroelectric phase over a range of pressure and temperature near the paraelectric-ferroelectric phase transition line. We have developed an algorithm to analyze the data, allowing us to determine the values of the crystal field parameters and their temperature and pressure dependence r...

We determine the anisotropy of the mobility of photoexcited charge carriers in single crystals of KNbO3 and BaTiO3 by means of a purely optical method. In orthorhombic KNbO3 the mobility anisotropy is measured for both electrons and holes giving ma mc 1.05 6 0.06, mb mc 2.9 6 0.3 for holes and ma mc 1.15 6 0.09, mb mc 1.9 6 0.2 for electrons. In BaTiO3 we find for holes ma mc 19.6 6 0.6. Our ex...