In-situ construction of CrO@ATO hybrid pigment towards synergetic enhancement of visible light-infrared-radar compatible stealth.

Multiband compatible stealth engineering with controllable visible light-infrared (VIS-IR) features and radar wave absorption is urgently needed to improve the survivability of advanced military equipment. CrO has good visible light stealth performance under green background, but it is lack of IR and radar multi-band stealth properties. Herein, a core-shelled CrO@stannic antimony oxide (ATO) structure was developed to enhance the IR-radar compatible stealth properties of CrO by in-situ precipitation method, concurrently maintaining its visible light stealth property. The morphology, conductivity, and infrared stealth properties of the CrO@ATO hybrids were influenced by the calcination temperature, and the IR and radar stealth performance were tunable by ATO content. The lowest emissivity of CrO@ATO pigments is 0.852, reduced by 10% than pure CrO. The CrO@ATO filled silicone resin coatings possessed good thermal stability and IR stealth stability. Benefiting from the enhanced interfacial polarization and conductive loss, the CrO@ATO exhibited an effective absorption bandwidth of 2 GHz in the X band, with respect to pure CrO without radar absorption property. The CrO@ATO structure opens an avenue for advanced VIS-IR-Radar compatible stealth materials.