Inorganic polysilazane, also known as fully hydrogenated polysilazane, is a type of polysilazane. Here is some information about it:
Structural characteristics
It is a type of inorganic polymer with Si-N bonds as repeating units in the main chain, and silicon atoms and nitrogen atoms are alternately arranged to form the polymer main chain.
Performance characteristics
High temperature resistance: It can be thermally decomposed into ceramic materials such as SiCNO, SiCN, or SiO ₂ under high temperature conditions, and can be used to protect materials in high temperature environments.
High hardness: After curing, the hardness can reach over 8H, providing good wear resistance and scratch resistance.
Chemical stability: It has a certain degree of chemical stability, good tolerance to certain chemicals, and can resist to some extent the erosion of acidic and alkaline chemicals.
Good film-forming ability: capable of forming a uniform and dense coating, providing good protection and decoration for the substrate material.
synthetic method
Ammonia hydrolysis method: It is an early developed synthetic method that uses ammonia gas to undergo ammonia hydrolysis reaction with compounds such as chlorosilane to prepare polysilazane.
Hydrazine hydrolysis method: Synthesize polysilazane by reacting hydrazine with corresponding silicon compounds.
Amine hydrolysis method: using amine compounds to react with silicon compounds to obtain polysilazane.
Ring opening polymerization method: using silazane ring to form polysilazane through ring opening polymerization under certain conditions.
Dehydrogenation coupling method: Compounds containing silicon hydrogen (Si-H) and nitrogen hydrogen (N-H) undergo dehydrogenation coupling reaction to generate polysilazane.
application area
Ceramic precursor: used for preparing ceramic fibers, bulk ceramic materials, ceramic coatings, porous ceramic materials, ceramic MEMS components, composite materials, etc.
Coating material: It can be applied to the surface of carbon fiber, metal, and other materials to improve their oxidation resistance, corrosion resistance, and other properties. It is used for high-temperature protection of exhaust pipes, pistons, heat exchangers, and other components in automobiles and trucks.
Resin material: It can be directly used as a resin matrix, as well as for modifying allyl phenol formaldehyde, epoxy resin, silicone resin, etc.
Market situation
Global market: The concentration of global polysilazane production is very high, with Merck KGaA from Germany occupying the main share of the global market, especially in the field of inorganic polysilazane, which has a strong market position.
Chinese market: The Chinese polysilazane market is in the development stage. Although it has mass production capacity, there is still a certain gap compared to international enterprises, and there is great potential for future market growth.
