The reason why polysilazane can exhibit high hardness and excellent performance at high temperatures is mainly based on its unique chemical structure and conversion mechanism. The following is a detailed explanation of its usage principle and reasons for high hardness resistance:
1. Principle of use
The principle of using polysilazane mainly depends on its pyrolysis conversion process and cross-linking solidification mechanism:
Thermal decomposition conversion:
At high temperatures (usually above 800 ° C), polysilazane is transformed into ceramic materials (such as silicon nitride Si ∝ N ₄ or silicon carbide SiC) through pyrolysis reactions.
During this process, organic groups gradually decompose, and silicon and nitrogen recombine to form a stable inorganic ceramic structure.
Cross linked curing:
At lower temperatures (200-400 ° C), polysilazane forms a three-dimensional network structure through crosslinking reaction.
During the crosslinking process, the formation of Si-N and Si Si bonds enhances the mechanical strength and thermal stability of the material.
2. Reasons for high hardness resistance
The high hardness of polysilazane is mainly due to its chemical bonding properties and ceramic conversion process:
Strong chemical bond:
The Si-N bond energy in polysilazane is relatively high (about 435 kJ/mol), stronger than the C-C bond (about 347 kJ/mol), endowing the material with high hardness and thermal stability.
The Si-N and Si Si bonds formed after crosslinking and solidification further enhance the mechanical properties of the material.
Ceramic Conversion:
At high temperatures, polysilazane is converted into silicon nitride or silicon carbide ceramics, which themselves have extremely high hardness and wear resistance.
The dense structure formed during the ceramic transformation process further enhances the hardness and strength of the material.
Inorganic organic hybrid structure:
The inorganic organic hybrid structure of polysilazane gives it the processability of organic polymers at lower temperatures and the ability to transform into inorganic ceramics at higher temperatures, combining the advantages of both.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.