| abstract |
The invention discloses a wave-absorbing composite material, which is prepared from raw material inorganic nano-material modified phenolic resin, polystyrene particles, wave-absorbing filler, curing agent and flame retardant. The resin matrix can form a good infiltration between the filler and the filler. The relationship guarantees the mechanical properties and wave-absorbing ability of the composite material. The invention also discloses the preparation method of the above-mentioned wave-absorbing composite material, which consists of three steps of granulation, film coating and molding, and the process is simple and suitable for large-scale industrial application. The invention also discloses the application of the above-mentioned wave-absorbing composite material in the preparation of echo-free anechoic chamber, which shows the characteristics of low density and high compressive strength, which is beneficial to meet the requirements of the use environment of large-scale precision equipment on the mechanical properties of the wave-absorbing material; And it has high oxygen index, low smoke density, low thermal conductivity, and shows good fire performance. The wave absorbing composite material of the present invention exhibits good absorption capacity for the low frequency band of electromagnetic waves, and has good application prospect and promotion value. |