Development of materials with a multilayer structure of the gradient type based on liquid compositions for the shielding of electromagnetic fields

Abstract

Nowadays, for shielding and absorption of electromagnetic fields of a wide frequency range, composite materials or solid metal structures are offered and widely used. The article deals with research and development of multilayer protective liquid materials for shielding electric, magnetic and electromagnetic fields of a wide frequency range. A series of liquid shielding mixtures based on standard certified paints and finely dispersed magnetite was produced. Testing of the protective properties of these mixtures was carried out by sequentially applying 2–3 layers of mixtures to the surface, each of which had a certain concentration of the shielding substance. The shielding and reflection coefficients for these multilayer structures are given. It is shown that the advantage of the developed multilayer protective liquid materials lies in obtaining a gradient of electrophysical and magnetic properties of the protective structure with the possibility of calculating dielectric and magnetic permeabilities, taking into account the morphology of the shielding particles. A method of obtaining protective materials of the gradient type, which reduce the influence of electromagnetic fields, is proposed, which is possible for the treatment of surfaces of large areas and complex configurations.