Abstract
AbstractBamboo charcoal coated with silver (BC/Ag) was prepared by activation and chemical reduction processes at different AgNO3 contents (10‐30 wt.%). The spectroscopic characterizations of the formation processes of BC/Ag composites were studied using X‐ray diffraction, scanning electron microscopy and transmission electron microscopy. These composites were introduced in epoxy resin to be a microwave absorber and mixed polyethylene to be an infrared stealth plate. Microwave absorbing properties were investigated 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. The thermal extinction measurements in the 3‐5 and 8‐12 μm were done to evaluate the shielding affectivity of infrared. The results showed that a significant thermal extinction and a wider absorption frequency range could be obtained by adding silver to bamboo charcoal.
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