Abstract:

To increase the survival ability of military supplies, expedite the usage of infrared stealth material, Al, La doped ZnO was used as filler to prepare infrared stealth coating and coated on tent fabrics. The influences of filler content and film thickness on infrared emissivity were studied in detail. The relationship between heat conduction and infrared emissivity was also studied. The infrared emissivity decreased with the increase of the thickness and content of coating filler. The infrared emissivity of coating tent fabric can decrease to 0.622 when filler mass content is 70%. The tent fabrics with infrared emissivity between 0.622 and 0.932 can be obtained by changing the filler content and coating thickness. Moreover, we also found that thermal conductivity has the influence on the infrared stealth ability to some extent. The infrared stealth ability improved with the increase of thermal conductivity. Different infrared emissivity coatings were made by adjusting the filler content and coating thickness and took thermographs under different surroundings. It showed that the coatings have good camouflage ability under different surroundings.

Key words: doped zinc oxide, infrared stealth coating, heat conduction, camouflage, tent fabrics