Properties of Ferrite-Filled Systems Based on High Molecular Weight Compounds. Investigation of the Electrophysical Properties of Ferrite-Filled Gels Based on Polyvinyl Alcohol

Experimental and Theoretical Investigation of Polarization Processes in Colloidal Systems

“…The analysis of kinetic dependencies of depolarization current revealed the patterns of change in the structure of polyvinyl alcohol gels filled with gelatin, papaine and Na-CMC (sodium carboxymethyl cellulose) [7][8][9], and solutions of polyvinyl butyral (PVB) [10] which provided for optimization of LDS compositions by criterion of their structural stability. It has been established that the stability factor is associated with existence of an electrical double layer on particles [11][12] and is determined by an additional electrostatic component of the wedging pressure and an entropy component of physicochemical interaction of components in the system.…”

“…Increase in polarization current results in abrupt "depletion" of the solution (decrease in concentration of the filler particles in the volume), and the fan-shaped divergence of depolarization curves at repeated measurements is observed [13][14]. Physical modeling of polarization processes in LDS can broaden the concepts of polarization mechanisms in such systems.…”

“…Then, by substituting the values of the specified parameters into (13) and assuming that τ1 = 1 s, τ2 = 180 s, we get the ratio α = с(τ1) / с(τ2) which determines by how many times the particles concentration will decrease in the near-electrode layer after isothermal aging of the cell for 180 s. The particles concentration in the near-electrode layer at different points in time determines the amount of particles involved in the conductivity:…”

“…jt / q = const. Some of the particles localized at the electrode after the first cycle of polarization return into the solution (as the result of diffusion), and by the end of isothermal aging during τ time the equation for the amount of particles in the cell taking into account (13) and (14) will be as follows (the second cycle):…”