Polysilazane has excellent performance, small angle between silicon and nitrogen bonds, and high molecular bond tension, making it difficult for the molecular chain to form a ring. During the molecular polymerization reaction, it is not prone to side reactions such as biting back and rearrangement, and has good thermal stability. By changing the substituents of silicon or nitrogen atoms, polysilazanes with specific properties can be designed. At present, polysilazane materials are not widely used. The main reason is that most polysilazane materials are relatively active, have high reactivity, and are prone to chemical reactions with water, polar compounds, and oxygen, making preservation and transportation more difficult; The synthesis method of polysilazane is not yet mature, the molecular structure of the reaction product is complex, and the molecular weight of the polymer is generally low. Polysilazane mostly exists in the form of binary or quaternary ring structures or linear oligomers, and its heat resistance is generally poor.

Polysilazane materials are mainly used in the fields of ceramic precursor preparation, coating material synthesis, and medical surgery. The ceramic materials made from polysilazane through pyrolysis and polymerization have the advantages of good flow performance, designable composition, good heat resistance and uniform product composition. At the same time, polysilazane is easy to pyrolysis and polymerization, and the reaction temperature is low, so it is widely used in the preparation of foam ceramic materials.

With the continuous development of modern technology, the molecular structure design, product synthesis, and application research of polysilazane have achieved exceptionally rapid development. Research results related to the construction of polysilazane with clear molecular structure have been reported. In recent years, there has been extensive research on the spinning ability and material coating application of polysilazane ceramics both domestically and internationally. Further research on the heat resistance of polysilazane still needs to be conducted. The author reviewed the existing synthesis methods and reaction principles of polysilazane, utilized the molecular structure of polysilazane to design special chemical properties, proposed research ideas for synthesizing heat-resistant high molecular weight polysilazane, and looked forward to the development prospects and research directions of polysilazane.