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http://dx.doi.org/10.5345/JKIBC.2021.21.5.459

Evaluation of Electromagnetic Shielding Performance of SiC and Graphite Mixed Mortar  

Park, Oh-Seong (Graduate School, Department of Materials Engineering, Pukyong National University)
Cho, Hyeong-Kyu (Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korea Institute of Building Construction / v.21, no.5, 2021 , pp. 459-468 More about this Journal
Abstract
Blocking electromagnetic waves on the exterior walls of buildings effectively reduces the intensity of electromagnetic fields in buildings, which leads to attenuation of electromagnetic disturbances, so there is a great interest in developing technologies. In this study, SiC by-products and graphite generated in the semiconductor field were selected and mixed into mortar after pretreatment such as pulverization to evaluate their physical properties and electromagnetic wave shielding performance. Considering the economic efficiency of each shielding material, only 10% volume of the outermost side of the experiment was mixed with each shielding material to evaluate the shielding performance. The shielding performance was predicted when the experiment was manufactured by mixing the shielding material with the entire volume of the experiment using the shielding effect evaluation formula. The results of the experiment showed that the shielding performance was up to 20 dB when SiC grains were mixed with shielding materials, the shielding performance was up to 18 dB when graphite powder was mixed with shielding materials, and the shielding performance was up to 28 dB when SiC powder was mixed with shielding materials, and the shielding performance was close to 30 dB, which is known to have a shielding rate of 99.9%.
Keywords
electromagnetic shielding; shielding mortar; silicon carbide; graphite;
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