Effect of the Water Quenched Slag‐epoxy Resin Composite on Microwave Absorbing Properties

Although in recent years, the ash residues produced from municipal solid waste incinerators (MSWI) in Taiwan have been decreased gradually due to the public awareness of waste classification, it is still necessary to find a suitable landfill site to dispose these wastes safely and economically. For this reason, the plasma melting technology was selected to convert the unwanted ash residues into harmless water quenched slag. More importantly, the effect of the dielectric and magnetic properties of microwave absorber composed of water quenched slag‐epoxy resin composite was studied. The absorbing performance of water quenched slag‐epoxy composites at same sample thickness and at various sample thickness were also studied by measuring complex permittivity, complex permeability and reflection loss in the 2–18 and 18–40 GHz microwave frequency range using the free space method. It was found that the optimum thickness of absorber needed to yield the best reflection loss could be obtained and an absorption frequency range shifting at the frequency range of 2–18 and 18–40 GHz.