| This paper explained the principle of infrared camouflage and radar camouflage, according to influencing factors of infrared stealth, several material-systems were-selected to study the infrared microwave compatibility.First, in this paper, the method of resin pyrolysis was chosen to prepare carbon-coated single metal and composite metal nano-particles. Through the performance and mechanism analysis, it was found that the dispersion of metal nanoparticles was better; pyrolysis process mainly occurred in the 150℃-500℃. In the 8-14μm the infrared emissivity of Cu/C was better, the emissivity value is around 0.7. Microwave performance of Fe/C is better, when the coating thickness is 2.5mm, in the 14GHz, the Rmin is-5.6dB.Secondly, in this paper, the method of microemulsion polymerization was used to prepare magnetic phase-change microcapsulats. The ferrite, which was modificatd, was doped in the phase-change micro-capsules, for the first time. It was found that the water-soluble initiator is better, and when the amount of emulsifier was the lwt%, the capsule form is better. The infrared radiation of targets can be effectively shielded by the magnetic micro-phase change capsules, so that the infrared emissivity value could be controled, which was about 0.6.Third, it is found that nc-Si superlattice films have a better IR performance for the first time. The infrared properties of nc-Si superlattice films was mainly due to the formation of a rough surface caused by diffuse reflection; when the superlattice period was 25 and the particle size was 4nm, he emissivity value is around 0.324, when the size of nc-Si is 4 nm.Fourth, microwave absorption properties and thermal infrared properties were explored, and the mechanism of composite layer for further provided a theoretical basis was analyzed. |
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