This invention provides a
silicon-based protective
coating based on room-temperature curing inorganic
polymerization and synergistic
thermal insulation technology. The technical solution uses inorganic
polysilazane as the core to construct a ceramicized layer with a loose inorganic network. The
polysilazane forms an inorganic network mainly composed of Si–O–Si and Si3N4 within the
system, significantly reducing
thermal conductivity. Based on this, nano-hollow
ceramic microspheres are added to form numerous static air cavities within the
coating to block heat conduction paths. Simultaneously,
titanium dioxide and aluminum
powder form an intercalation structure with the network-like ceramicized
polysilazane, achieving
specular reflection and suppressing radiative
heat transfer. These three
thermal insulation mechanisms work together to form a triple synergistic
thermal insulation effect. Furthermore, this invention uses nano-
alumina as a filler to form a filling structure within the network-like ceramicized layer formed by the polysilazane, and it interpenetrates with
nickel acetylacetonate. This infiltration and cross-linking structure lowers the curing temperature and forms a dense
coating on the substrate, improving the overall physical properties of the coating.