Dependence of an electric capacitance on the constant voltage C = f(U) in pure bentonite, composites and semiconductors

Abstract

The present paper is devoted to studying the effect of dc voltage on the amount of electrical capacitance in pure bentonite, composites and semiconductors with different conductivity, as well as the dependence of electrical conductivity on the external field. The reason for the dependence of the capacitance on the DC voltage may be the presence of potential barriers in them and the dependence of the electrical conductivity (σ) on the applied voltage. In those samples where there is a large range of variation of σ, there are also large changes in electrical capacitance. The principle of a change in electrical conductivity, a change in the electrical capacitance is observed, can be successfully used in microelectronics, electrical engineering, etc. Created capacities parameters can changed in a wide range of voltage and temperature.

Sustainably Sourced Mesoporous Carbon Molecular Sieves as Immobilization Matrices for Enzymatic Biofuel Cell Applications

“…The capacitance of both the MWCNT and CMK-3 support materials is determined using cyclic voltammetry by applying a solution of each material devoid of enzymes, mediators, and Nafion membranes to a glassy carbon electrode. The capacitance of the adsorbed substance on the electrode is represented by the area of its cyclic voltammetry curve [104,119]. Figure 4 depicts the cyclic voltammograms of MWCNTs and CMK-3 sieves.…”

Polar state in polycrystalline BaSn0.3Ti0.7O3 thin film determined from ac- & dc-field studies

“…Apart from the transformation to FE state, an additional sharp an-hysteretic peak, marked as 2 in figure 3, in permittivity at very high fields (∼ ±250 kV cm −1 ) is seen at all temperatures as well as frequencies. A Schottky type increase in current is observed from I -E characteristics in the similar field range [30] and this change in electrical conductivity might result a peak in capacitance [39].…”