I. Aerospace: A Guardian of Performance in Extreme Environments
Polysilazane exhibits exceptional high-temperature resistance and oxidation resistance in the aerospace field. Its high-temperature ceramicization properties make it an ideal material for hot-end components of aero-engines, rocket nozzles, and thermal protective coatings. In environments above 1000℃, polysilazane can transform into Si₃N₄ or SiCN ceramics, forming a dense protective layer that effectively prevents oxygen diffusion and extends component lifespan. For example, gas turbine blade coatings treated with polysilazane show significantly improved thermal shock resistance, allowing them to withstand extreme temperature fluctuations without failure.

II. Electronic Packaging: A Reliable Barrier for High-Frequency Devices
The low dielectric constant (2.5-3.5) and excellent insulation properties of polysilazane make it a preferred material for high-frequency electronic device packaging. In chip passivation layers, MEMS device protection, and optical coatings, polysilazane provides high transmittance (>95%) and low dielectric loss, meeting the stringent material performance requirements of cutting-edge technologies such as 5G communication and artificial intelligence. Furthermore, as a precursor to solid-state battery electrolytes, it can improve battery thermal stability and promote the development of new energy technologies.

III. Industrial Corrosion Protection: Long-Term Protection in Harsh Environments
Polysilazane exhibits strong resistance to strong acids, strong alkalis, organic solvents, and salt spray environments, and is widely used in chemical pipelines, marine equipment, and metallurgical coatings. By adding fillers such as silicon carbide and boron nitride, the pyrolysis shrinkage rate of the coating can be further reduced, cracks and porosity can be minimized, and long-term protection at high temperatures of 800-1200℃ can be achieved. For example, after applying polysilazane coatings to bolts on offshore platforms, the corrosion resistance is improved several times, significantly reducing maintenance costs.

IV. Emerging Fields: Unlocking the Potential of Cross-Industry Applications
Polysilazane demonstrates innovative applications in fields such as 3D printing, biomedicine, and architectural coatings. Its liquid precursors enable the direct molding of complex ceramic components, such as customized biomedical implants; through modification, superhydrophobic surfaces can be prepared for antifreeze, de-icing, and self-cleaning coatings; in the construction field, polysilazane coatings provide ultra-long weather protection, resisting ultraviolet radiation and extreme climates, and extending the service life of building exterior walls.