The Effect of Different Nanomaterials Additions in Clay-Based Composites on Electromagnetic Transmission

Ivan Vrdoljak; Jelena Brdarić; Slavko Rupčić; Berislav Marković; Ivana Miličević; Vanja Mandrić; Damir Varevac; Dalibor Tatar; Nikolina Filipović; Imre Szenti; Ákos Kukovecz

doi:10.3390/ma15155115

The Effect of Different Nanomaterials Additions in Clay-Based Composites on Electromagnetic Transmission

Materials (Basel). 2022 Jul 22;15(15):5115. doi: 10.3390/ma15155115.

Affiliations

¹ Faculty of Civil Engineering and Architecture Osijek, Josip Juraj Strossmayer University of Osijek, Vladimira Preloga 3, HR-31000 Osijek, Croatia.
² Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
³ Faculty of Electrical Engineering, Computing and Information Technologies Osijek, Josip Juraj Strossmayer University of Osijek, Kneza Trpimira 2B, HR-31000 Osijek, Croatia.
⁴ Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary.

Abstract

In this study, clay composites were subjected to electromagnetic transmission testing at frequencies in the region of non-ionizing radiation. Specimens were made with partial substitution of clay with different admixtures by mass. Admixtures used were Fly Ash, four different particle sizes and phases of Titanium Dioxide (TiO₂), Zinc Ferrite (ZnFe₂O₄), Maghemite (γ-Fe₂O₃) and Antimony Tin Oxide (ATO). The additives were thoroughly (chemically, structurally, morphologically) characterized. The replacement percentage was 5 wt.%. Electromagnetic transmission assessment included S₂₁ transmission coefficient measurements for samples with different additives. The lowest transmission was reported for the clay specimens with ATO and Titanium Dioxide, especially at higher frequencies. A decrease in the transmission parameter with increasing specimen thickness was also confirmed.

Keywords: clay composite; electromagnetic radiation shielding; nanomaterials; transmission.

Grants and funding

This work has been supported by Operational Program Competitiveness and Cohesion 2014–2020. Investing in science and innovation KK.01.1.1.04: “Development and application of advanced building materials for the construction of healthy buildings: protection against non-ionizing radiation” ref. no. KK.01.1.1.04.0105.