Transient and Steady State Currents of Bisphenol A Corncobs Sample

Abstract

Transient current (I-t), current-voltage (I-V) characteristics, and dc conductivity ln(σ) for bisphenol A corncobs (BPACC) sample were investigated. At higher temperatures, I-V characteristics reveal that the dc current for the sample undergoes two regions one due to ohmic conduction and the other has been attributed to Space charge limited current (SCLC). The activation energy (E a ), the electron mobility (μ o ), effective electron mobility (μ e ), the concentration of the charge's concentrations in conduction band, trapping factor (θ) and the trap concentration (N t ) were calculated. At lower temperatures, the dc current exhibits a peculiar behavior for I-t regime and I-V characteristics. Transient current of BPACC sample exhibits approximately constant value at constant electric field and it has saturation value for I-V characteristics. The attained results suggest strongly the applicability of this material in the electrical applications.

Dielectric and Electric Modulus Behavior of Chlorinated Poly(Vinyl Chloride) Stabilized with Phenyl Maleimide

“…Several theoretical models have been proposed to interpret the σ ac for the amorphous semiconductors [20]. It is assumed that, the dielectric loss occurs because of the localized motion of charge carriers within a pair of sites [33]. Two distinct mechanisms have been proposed for relaxation phenomena quantum mechanical tunneling, QMT, of electrons or polarons through the barrier separating localized states and classical hopping over the same barrier.…”

“…This indicates that s values are temperature independent. For the correlated barrier hopping, CBH, model [33], it was assumed that single electron motion is responsible. The frequency exponent s in the CBH model can be controlled by [34]:…”

Electrical and mechanical properties of aluminum-loaded NBR composites

“…This deviation from linearity at lower fields may be attributed to the accumulation of space charge at the electrodes. [10][11][12] The observed relation between the current density and electric field strengths, log J À E 1/2 , points to a conduction mechanism in which the charge carriers are released by thermal activation over a Coulomb's potential barrier that is decreased by the applied electric field. The physical nature of such potential barrier can be interpreted by two basic ways.…”

“…Alternatively, charge carriers can be released due to the ionization of impurity centers in the dielectric (Poole-Frenkel effect). [11][12][13] To determine the actual conduction mechanism at room temperature (300 K), the value of b at room temperature deduced from the slope of the plots log J versus E 1/2 are compared with that of the theoretical values in Table 2. The theoretical values of b may be deduced from the relation: 11,12…”

“…Equations ( 9) to (12) indicate that once the three values L , H and " 0 L are determined from experiment, the entire frequency response can be constructed for the conductivity and dielectric constant.…”