Development of geopolymer composites for EMI shielding from steel industry waste

Sustainable Geopolymer Structural Insulation Panels Obtained with the Addition of Power Plant Ash and Furnace Slag with Potential Uses in the Fabrication of Specialized Structures

“…The acoustic performance has not been separately discussed but instead included within the generic physical properties of investigated geopolymer composites (e.g., [40,41]) without emphasizing a real application of such structures for acoustic insulation purposes. Finally, some studies (e.g., [42,43]) emphasized the electromagnetic properties of geopolymer composites, mainly related to the GHz domain, but the recipes for these materials included either iron powder/iron ore fine or carbon powder/fibers, materials known to enhance the electromagnetic shielding properties by themselves, so the geopolymer recipe in fact makes no contribution. It must be mentioned that such compositions are far from normal for geopolymer materials, made with high costs, and address a disputable market, related mainly to electronic applications, in which other types of composites are more suitable for use (see, for example, [44][45][46][47]).…”