Calculation Estimation of the Relative Permittivity of Nonmagnetic Conducting Materials under the Action of Variable Conduction Current

IF 0.9 Q3 Engineering Surface Engineering and Applied Electrochemistry Pub Date : 2024-04-26 DOI:10.3103/s1068375524020029

M. I. Baranov

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Abstract

A special case of equality of the conduction current density and the displacement current density in a homogeneous nonmagnetic conducting medium was used to consider the results of approximate calculation estimation of the relative permittivity ε_r of nonmagnetic conducting materials (metals and alloys), which are extensively used in electrical power engineering, electric power industry, and high-voltage pulse technology under the influence of variable (pulsed) electric currents and electromagnetic fields (EMF) with various amplitude–time parameters. It was demonstrated that, in the investigated case, at low frequencies f₀ of conduction current and EMF (at a frequency on the order of 10² Hz) in the range of extremely low-frequency electromagnetic waves (EMW), the materials under consideration exhibit extremely high values of the electrophysical parameter ε_r (on the order of 10¹⁵). For extremely high frequencies f₀ of current and EMF (at a frequency on the order of 5 × 10¹³ Hz) in the infrared range of EMW, these conducting materials are characterized by ε_r values on the order of 10²–10⁴, and in terms of the electrophysical parameter ε_r, they approach solid dielectrics and ferroelectrics.

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非磁性导电材料在可变传导电流作用下的相对脆导率的计算估算

摘要利用均质非磁性导电介质中传导电流密度和位移电流密度相等的特殊情况，考虑了非磁性导电材料（金属和合金）相对介电率 εr 的近似计算估算结果，这些材料在电力工程、电力工业和高压脉冲技术中广泛使用，受具有各种幅值-时间参数的可变（脉冲）电流和电磁场（EMF）的影响。研究表明，在极低频电磁波（EMW）范围内，在传导电流和电磁场的低频 f0（频率约为 102 Hz）情况下，所研究的材料表现出极高的电物理参数εr 值（约为 1015）。在红外电磁波范围内，对于极高频率的电流和电磁场 f0（频率约为 5 × 1013 Hz），这些导电材料的εr 值约为 102-104 量级，就电物理参数εr 而言，它们接近固体电介质和铁电体。

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来源期刊

Surface Engineering and Applied Electrochemistry Engineering-Industrial and Manufacturing Engineering

CiteScore

1.60

自引率

22.20%

发文量

期刊介绍： Surface Engineering and Applied Electrochemistry is a journal that publishes original and review articles on theory and applications of electroerosion and electrochemical methods for the treatment of materials; physical and chemical methods for the preparation of macro-, micro-, and nanomaterials and their properties; electrical processes in engineering, chemistry, and methods for the processing of biological products and food; and application electromagnetic fields in biological systems.