High-temperature-resistance and antioxidant infrared low-emissivity composite film and preparation method thereof

The invention belongs to the technical field of infrared stealth, and particularly relates to a high-temperature-resistance and antioxidant infrared low-emissivity composite film and a preparation method thereof. The high-temperature-resistance and antioxidant infrared low-emissivity composite film is of a double functional layer superposition structure and sequentially comprises a low-emissivityfunctional layer and an oxidation isolation layer from bottom to top; and during using, the lowest layer of the high-temperature-resistance and antioxidant infrared low-emissivity composite film covers the surface of a target object, the low-emissivity functional layer is a high-temperature conductive ceramic film continuously formed, and the oxidation isolation layer is an Al2O3 film. According to the high-temperature-resistance and antioxidant infrared low-emissivity composite film, the emissivity at 8-14 [mu]m is less than 0.1 after being used in 750 DEG C high temperature and aerobic environment for 2 h, the emiss