Ionic conductivity in silicate glasses is a major issue the energy sector due to its detrimental effect on electric generation and storage has received increasing attention over past years. In this study, surface modification of soda–lime–silica (SLS) float glass via acid-leaching treatment (pH 1) was implemented understand impact ionic transport. The created sodium-depleted “silica-like” struc...

Analysis of the thermally stimulated depolarization currents in Ca-doped NaCl crystals is carried out by taking into account the presence of the Ca-cation vacancy complexes with vacancies in both nearest-neighbourhood and next-nearest neighbourhood position. Relaxation parameters are derived by fitting the experimental data to standard equations. The results are, where possible, compared with t...

A thorough study on the distribution of defect-related active energy levels has been performed on nanocrystalline TiO₂. Films have been deposited on thick-alumina printed circuit boards equipped with electrical contacts, heater and temperature sensors, to carry out a detailed thermally stimulated currents analysis on a wide temperature range (5-630 K), in view to evidence contributions from sha...

The slowest (p=1) mode relaxation of several polyisoprenes has been experimentally isolated by thermally stimulated depolarization current techniques. Close to the glass transition the p=1 mode deviates from the exponential behavior assumed by Rouse and tube-reptation theories. This effect is found to be a consequence of the closeness of τ_{p=1} and α-relaxation time scales. The scenario resemb...

Thermoelectrets were prepared using polymethyl raethacrylate (PMMA), polystyrene (PS) and their blend in the 50:50 weight ratio. The TSDC spectra of PMMA shows both dipolar and space charge peaks, while the TSDC spectra of PS shows only the space charge peak. The TSDC spectra of the blend however, shows only one peak which is the space charge peak. It is therefore concluded that the PMMA dipole...

The thermally stimulated depolarized current and temperature profiles (TSDC analysis) on iced water was proved to be an effective tool for the qualitative evaluation of various water samples, each having an independent relaxation process, brought about by a pure dipolar orientation. The method proved to be applicable to different kinds of water samples used in the experiment and tap-water sampl...

AbsfracfA charge density and current density model of a waveguide system has been developed to explore the ef€ects of electric field electrode poling. An optical waveguide may be modeled during poling by considering the dielectric charge distribution, polarization charge distribution, and conduetion charge generated by the poling field. These charge distributions are the source of poling curren...