Mathematical Modeling of Dielectric Permeability and Volt-Ampere Characteristics of a Semiconductor Nanocomposite Conglomerate

Abstract

Mathematical computer models of the permittivity of silicon-based nanostructures upon interaction with electromagnetic radiation in a wide frequency range have been developed. To implement computer models for studying the electrophysical properties of the structures under study, algorithms and a set of programs have been developed. The results of the study of materials will not only provide fundamental information about the physical effects occurring in composite nanostructures but will also be useful for solving problems related to calculations for given electrophysical problems. For a nanocomposite based on ceramics and semiconductor oxides of zinc grains, resonant bursts of permittivity are observed within a wavelength of 300–400 nm; it has been found that this is due to the presence of electronic polarization of the nanocomposite core. The paper presents the results of modeling the current-voltage characteristics of a nanocomposite based on ceramics and semiconductor grains of zinc oxide. The obtained results show that the geometrical parameters, such as the number of layers and sample width, affect the CVC of the nanocomposite, and the operating point of the CVC shifts. This may be of interest in the development of materials with desired electrical characteristics for the creation of varistors.

Improvements in the Electronic Performance of ZnO-Based Varistors by Modifying the Manufacturing Process Parameters

“…Each varistor producer has its unique "recipe" for producing varistors, beginning with the original chemical composition and finishing with the technical production process activities [2,3]. Only the methods of testing the quality of the finished material are standardized [4,5], providing the user with a set of well-determined sizes through standardized procedures [6].…”

“…The thermodynamic cycle parameters remain constant in industry regardless of the varistors' chemical mixture [20]. This procedure causes the pill's original volume [10] to be reduced by around 20% and its density to rise to the final density, which is around 5.7 g/cm 3 . A higher percentage of 98 up to 99% of this empirical value is reached via density correction.…”

“…The main functional improvements that can be made to these varistors, integrated into surge protection equipment, result from changing their manufacturing technology by changing the initial chemical composition and some parameters of the sintering cycle (temperature and pressure) [2]. One problem that arises during their service is ensuring the optimal electrical parameters (the nominal leakage current, the main electrical characteristics, the non-linearity coefficient, and the energy absorption capacity) [3]. This study is meant to maintain the electric equipment in an optimized service condition for as long as practically feasible, given that a certain electric current passing through a ZnO-based varistor is greatly impacted by temperature [1].…”

Lateral semiconductor magnonics: an array of GaAs stripes atop the YIG layer

“…This leads to the need for the numerical methods that are used for the analysis of magnonics structures in the electrodynamics approach, for example, the finite element method (FEM) [35,[41][42][43][44]. In addition, we note that resorting to the numerical methods allows one to avoid the problem of defining the semiconductor's mean spatial characteristics in case it arranges as a metamaterial [45,46]. As one of the observed spatial characteristics, the spin-wave coupling length in the lateral stripes of YIG separated with the air gap can be noted [47].…”