Polysilazane is a class of organic-inorganic hybrid polymers containing silicon-nitrogen bonds, exhibiting excellent thermal stability, oxidation resistance, electrical insulation, and mechanical properties. The silicon atoms and nitrogen atoms in its molecular structure are connected through covalent bonds, forming a stable network structure that allows polysilazane to maintain good performance under harsh environments such as high temperatures and strong oxidation.

The synthesis methods of polysilazane are diverse, including direct synthesis, polycondensation, and ring-opening polymerization. The direct synthesis method involves reacting silane with ammonia or nitrogen at high temperatures to directly produce polysilazane. The polycondensation method utilizes small molecules containing silicon-nitrogen bonds to obtain high-molecular-weight polysilazane through polycondensation reactions. The ring-opening polymerization method involves the ring-opening polymerization of cyclic silazane monomers under the action of a catalyst to form linear or crosslinked polysilazane.

Due to its unique properties, polysilazane has a wide range of applications in aerospace, electronic packaging, high-temperature coatings, ceramic precursors, and other fields. In the aerospace industry, polysilazane serves as a high-temperature structural material capable of enduring extremely high temperatures and pressures. In the field of electronic packaging, it acts as a high-performance insulating material, enhancing the reliability and stability of electronic devices. Additionally, polysilazane is used to prepare high-temperature coatings and ceramic precursors to meet the demands for high-temperature stability and chemical stability in specific fields.

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