In the field of modern materials science, polysilazane, as a highly promising coating material, is playing an increasingly important role. To successfully apply polysilazane to coatings, multiple rigorous and critical steps are required.
The first step is the pre-treatment of materials. Polysilazane is mostly present in liquid form, and its storage conditions are crucial. It is necessary to ensure a dry and clean environment to prevent moisture and impurities from entering, so as not to affect the final quality of the coating. Before actual use, it is often necessary to make operational adjustments based on specific construction requirements. For example, when a thin and uniform coating is desired, a suitable organic solvent such as toluene, xylene, etc. should be selected to dilute it. During the dilution process, it is necessary to accurately control the amount of solvent used, and at the same time, mix the polysilazane with the solvent evenly through thorough stirring, so that it has good fluidity and is convenient for subsequent coating construction.
The choice of coating method is directly related to the coating effect. Immersion coating is suitable for small and regularly shaped objects. For example, when coating some precision metal small parts, slowly immerse the parts in a polysilazane solution, determine the immersion time based on the material of the parts and the required coating thickness, and then take them out at a constant speed. Let the excess solution flow away naturally, and a uniform coating can be formed on their surface. Spraying is a commonly used and efficient method in industrial production. For example, on large-scale automotive parts production lines, by adjusting parameters such as spray gun pressure, nozzle specifications, and spraying distance, it is possible to quickly cover complex shaped parts with a large area of polysilazane coating, ensuring production efficiency and coating quality. Brushing is more focused on irregular shapes and objects with high requirements for details, such as handicrafts with exquisite carved patterns. Using a soft bristled brush dipped in solution to carefully apply can ensure that details such as patterns are also perfectly covered.
Curing treatment is a key step in showcasing the performance of polysilazane coatings. Thermal curing is one of the common methods. The coated substrate is placed in a heating device such as an oven, and gradually heated to the appropriate curing temperature according to a scientific heating curve. This temperature varies depending on the type of polysilazane, and may range from tens to hundreds of degrees Celsius. When kept in a high temperature environment for a certain period of time, cross-linking reactions occur between the molecules of polysilazane, forming a strong three-dimensional network structure that endows the coating with excellent hardness, wear resistance, and corrosion resistance. Protective coatings for high-temperature components in the aerospace industry, after strict thermal curing, can function effectively in extreme environments. UV curing cannot be ignored either. After adding a suitable photoinitiator to polysilazane, specific wavelengths of light are used to irradiate the photoinitiator, which is excited by light to produce active substances and trigger molecular cross-linking, achieving rapid curing. This method is very friendly for heat sensitive substrate materials, such as optical lenses, which can form coatings through photopolymerization without being affected by high temperatures on their optical properties.
The post-treatment after coating formation cannot be ignored. If there are strict requirements for the flatness and smoothness of the coating surface, grinding and polishing are essential steps. First, use coarse sandpaper to remove larger surface defects, then switch to finer sandpaper for polishing, and finally polish with polishing paste to achieve a mirror like smooth effect on the coating. This is crucial in applications such as decorative coatings and high-precision optical reflective coatings. In addition, surface modification is also an effective way to optimize coating performance. By chemically grafting specific functional groups onto the coating surface, the surface characteristics of the coating can be changed, such as making it superhydrophobic and meeting the needs of anti fouling and self-cleaning in different scenarios.
In summary, through this comprehensive application process, polysilazane has endowed numerous substrate materials with a variety of excellent properties, and has broad prospects in coating applications in various industries.

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