The microwave absorbing rubber was prepared by adding the microwave absorber PPy/Ni/NanoG and other additives into NBR rubber. By analysis, the proper contents of N330, DOP and PPy/Ni/NanoG are 60, 10 and 25, respectively. The reflection loss of the rubber is below-10 dB at 8.2~11.4 GHz and the minimum loss value is-14.58 dB at 9.76 GHz.
The complex permittivity and microwave absorbing potential of KD-I SiC fiber fabrics at X band as functions of thermal oxidation time and temperature were investigated. The values of ∊’ (real part) and ∊” (imaginary part) of the complex permittivity of the fabrics decreased with increasing thermal oxidation time and temperature. It was found that the microwave absorbing potential of fabrics can be optimized by thermal oxidation. The best reflection loss was obtained for the sample oxidized for 30 min at 500°C. Its lowest reflection loss is about −25.4 dB at 10.3 GHz, and its absorbing frequency band is about 4 GHz. The oxidized KD-I SiC fiber fabric is a good microwave absorbing material with low density, high temperature resistance, and flexibility.
Study of the influence of Carbonyl iron particulate size as an electromagnetic radiation absorbing material in 12.4 to 18 GHz (Ku) Band