In some fields where high temperature stability, chemical stability, insulation performance, and specific inorganic ceramic conversion characteristics are required for materials, inorganic polysilazane can play a role, while organic polysilazane is difficult to apply due to its own structure and performance characteristics, mainly reflected in the following aspects:
Manufacturing of ultra-high temperature structural components: In the aerospace industry, components in ultra-high temperature environments such as rocket engine nozzles, thermal protection systems for spacecraft, etc., inorganic polysilazane can be thermally decomposed at high temperatures to form high-purity, high-performance ceramic materials that can withstand extremely high temperatures and thermal stresses. However, organic polysilazanes are prone to decomposition and carbonization at ultra-high temperatures due to the presence of organic functional groups, making it difficult to maintain stable structure and properties.
Extreme chemical corrosion environment protection: In extreme chemical corrosion environments such as chemical and marine industries, ceramic coatings or materials formed by inorganic polysilazane have high chemical stability and can resist the erosion of strong acids, strong bases, salt solutions, and various corrosive gases. The organic components in organic polysilazane may react with corrosive substances, leading to coating or material failure.
High performance electronic packaging: In the packaging of high-performance electronic devices such as high-power, high-frequency, and high-voltage, inorganic polysilazane cured has low dielectric constant, high insulation strength, good thermal and chemical stability, which can meet the strict requirements of electronic devices for insulation, heat dissipation, and environmental protection. The dielectric properties and thermal stability of organic polysilazane may not meet the requirements of high-performance electronic packaging, which will affect the reliability and service life of the device.
Nuclear industry related applications: Inorganic polysilazane can maintain stability in high temperature and high radiation environments in terms of structural materials, protective coatings, etc. of nuclear reactors, with good radiation resistance and chemical stability, ensuring the safe operation of nuclear facilities. Organic polysilazane is prone to damage its organic structure in high radiation environments, leading to phenomena such as chemical bond breakage and cross-linking, resulting in deterioration of material properties.
Preparation of high-precision ceramic based composite materials: When preparing high-performance ceramic based composite materials required in high-precision and cutting-edge fields such as aerospace and national defense, inorganic polysilazane can be used as a precursor to form a good bond with reinforcing materials such as fibers through precise control of the pyrolysis process, resulting in composite materials with specific properties. During the pyrolysis process of organic polysilazane, the presence of organic functional groups makes the pyrolysis behavior complex and difficult to precisely control, which is not conducive to the preparation of high-performance and high-precision ceramic matrix composites.

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