Development and investigation of protective properties of the electromagnetic and soundproofing screen
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 6, Issue 5
Abstract
<p>We have developed a technology for manufacturing an universal electromagnetic and soundproofing screen based on foam-latex and foam-polystyrene. The dispersity and physical characteristics of components in a material for shielding electromagnetic field and noise have been investigated. The designed material consists of latex and iron ore dust with dominating dispersion of 12 µm. In order to improve the soundproofing properties, latex was supplemented during fabrication with a foam-forming agent − synthetic oleic acid. To reduce the weight, we added granulated foam-polystyrene with the size of granules 1−3 mm to the material. We examined screens with a thickness of 5 mm and 10 mm with a different content of the metallic substance. It was determined that the shielding coefficients of the material 5 mm think containing 5‒20 % of iron ore content are as follows: for electromagnetic field of frequency 2.4‒2.6 GHz ‒ 1.8−44; for the magnetic field of industrial frequency ‒ 1.2−15.0. For the material with a thickness of 10 mm they are 2.9−52.0 and 2.3‒38.4, respectively. The noise reduction index of 41−44 dB is achieved at noise frequencies of 6−8 kHz, which is the most critical for humans. The structural study of the materials' surface was performed. It has been established that at the content of the metallic substance above 15 %, its distribution in the bulk of the material becomes non-homogenous. In order to improve the efficiency of electromagnetic protection, it is expedient to produce a magnetic or rheological fluid from iron dust in advance, to apply it in the technological process for foam-latex fabrication.</p>It has been proven that the combined electromagnetic and soundproofing (acoustic) screens, that are small in thickness and low in weight, could provide reduction of the levels of electromagnetic fields and noise to match the norms, which is especially important when they are applied in the transportat industry
Authors and Affiliations
Valentyn Glyva, Jaroslav Lyashok, Iryna Matvieieva, Valerii Frolov, Larysa Levchenko, Oksana Tykhenko, Olena Panova, Oleksiy Khodakovskyy, Batyr Khalmuradov, Kyrylo Nikolaiev
Keywords
Related Articles
- EP ID EP528276
- DOI 10.15587/1729-4061.2018.150778
- Views 70
- Downloads 0
Investigation of the process of fermentation of recovered whey-malt mixtures
<p>We report a study into the fermentation of the recovered whey-malt mixtures using the lactose-fermenting yeast and saccharomyces. The use of such mixtures for production of fermentation beverages using the appropriate...
Research into techniques for making wheat bread on hop leaven
<p>We investigated saccharification process of bitter scaldings depending on the parameters of their preparation and established that the largest intensity of sugar accumulation occurs within one hour of saccharification...
Studying the effect of the combined technology on durability of the shafttype parts
<p>Restoration of shaft parts with extending their service life is an important reserve of development and growth of repair efficiency. Improvement of wear resistance and durability of parts of agricultural machinery is...
Development of the method to operatively control quality of iron ore raw materials at open and underground extraction
<p>The main task of the mining industry is to improve the efficiency of extraction and processing of iron ore. One of the main factors contributing to solving the task is determining the content of iron in the ore body a...
Development of the method of frequencytemporal representation of fluctuations of gaseous medium parameters at fire
<p>The method of operative frequency-temporal representation of fluctuations of gaseous media parameters at an early stage of fire at premises was developed. The basic assumptions about the peculiarities of dynamics of h...