The application of polysilazane in coatings is a systematic process, where each link is closely connected to create high-performance coatings, providing reliable protection and functional enhancement for substrate materials in different fields.
Starting from the preparation stage of materials, the initial state and pretreatment of polysilazane have a profound impact on the quality of subsequent coatings. Generally speaking, the polysilazane we obtain is in liquid form and has high requirements for storage environment. It is necessary to avoid contact with water vapor and impurities, otherwise it is prone to deterioration and affect coating adhesion. Before being officially used for coating, dilution operations are quite common. Based on specific coating objectives, such as achieving thin and uniform coating effects, it is necessary to select appropriate organic solvents for dilution. Organic solvents such as toluene and xylene are often chosen due to their good solubility and volatility. When diluting, it is necessary to strictly follow the proportion and stir thoroughly to ensure the stability of various properties of the polysilazane solution, laying a good foundation for coating.
In the coating process, different coating methods have their own applicable scenarios and advantages. Immersion coating is a good choice for small, regularly shaped objects that require high overall coating uniformity. For example, the metal casing of some electronic components can be immersed in a solution of polysilazane, and after a brief stay, the solution can fully adhere to the surface of the casing before being removed. The surface of the casing can be uniformly covered with a polysilazane coating, which has functions such as insulation and oxidation resistance. The application range of spraying is even wider, especially in the field of industrial manufacturing. Taking the coating of household appliance shells as an example, the polysilazane solution is atomized by a spray gun and evenly sprayed on the surface of the shell. Operators can flexibly adjust the pressure, spraying angle, and distance of the spray gun according to factors such as the material, size, and desired coating thickness of the shell, achieving efficient and high-quality coating and greatly improving production efficiency. Brush coating highlights its advantages in detail processing. When facing some artworks or crafts with complex shapes and fine textures, using a soft bristled brush dipped in a polysilazane solution, carefully applying according to the direction and shape characteristics of the texture, can ensure that the coating covers every place that needs protection completely, allowing these precious items to retain their original artistic beauty and obtain performance improvements such as wear resistance and corrosion resistance brought by the polysilazane coating.
The curing process is a crucial step in shaping the performance of polysilazane coatings. Thermal curing has a mature process and wide applications. The substrate coated with polysilazane is placed in a heating device and gradually raised from a lower temperature to a specific curing temperature according to a set heating program. This temperature range varies depending on different polysilazane products, some may only require a few tens of degrees Celsius, while coatings used in high-temperature environments may require curing temperatures as high as several hundred degrees Celsius. After reaching the corresponding temperature, maintaining it for a certain period of time promotes cross-linking reactions between the molecules of polysilazane, thereby forming a stable and strong three-dimensional network structure, giving the coating strong performance. For example, in the protection of some metal parts on ships, the heat cured polysilazane coating can effectively resist the corrosion of seawater and long-term friction. Light curing, as a relatively novel and efficient curing method, involves the addition of a suitable photoinitiator and the use of specific wavelengths of light such as ultraviolet light for irradiation. The photoinitiator absorbs the light energy and generates active substances such as free radicals, which rapidly initiate crosslinking of polysilazane molecules and achieve instantaneous curing. This is particularly suitable for substrate materials that cannot withstand high temperatures and are sensitive to heat. For example, when coating the surface of some high-end plastic products, photopolymerization ensures the rapid formation of the coating without causing deformation of the plastic products due to heat, effectively protecting their original shape and properties.
After the coating is cured, post-processing operations also play an important role that cannot be ignored. Polishing can significantly improve the appearance quality and performance of coatings. For example, on the surface coating of some optical instruments that require high reflectivity, different grit sandpapers are first used to polish the coating from coarse to fine, removing small surface irregularities. Then, professional polishing materials are used for polishing treatment to achieve a nearly mirror like effect on the coating surface, greatly improving the reflection efficiency of the optical instrument. Surface modification, on the other hand, further optimizes the performance of coatings from a chemical perspective. By grafting special functional groups onto the surface of coatings, the hydrophobicity and other characteristics of the coatings can be changed. For example, on the surface of some outdoor building decoration materials, after surface modification to make them superhydrophobic, rainwater, dust, etc. are difficult to adhere to, achieving self-cleaning effect, extending the service life of materials, and reducing maintenance costs.
In summary, with its scientifically reasonable coating application process, polysilazane has provided many excellent properties such as high temperature resistance, oxidation resistance, corrosion resistance, insulation, etc. for substrate materials in many industries. Its application value in the field of coatings is constantly being explored and amplified, and it is expected to shine in more fields in the future.

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