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

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.

Preliminary small-scaled thermal resistance testing of a masonry wall with enhanced electromagnetic shielding effectiveness

“…One method is to use conductive shielding barriers, such as masonry or concrete walls, with improved EM shielding properties [4,5]. Vrdoljak et al [6] studied several conductive additives; among these, antimony tin oxide (ATO) showed the highest potential as an additive in small clay samples for enhancing EM shielding. The novelty of this study lies in the investigation of the thermal resistance of a masonry wall constructed with ATO-containing bricks and comparing it to a masonry wall constructed with regular bricks.…”