The curing methods of polysilazane mainly include the following:
Thermal curing
This is a relatively common way. When heated to a certain temperature, the silicon nitrogen bonds on the molecular chain of polysilazane undergo a series of chemical reactions such as rearrangement and cross-linking, thereby achieving solidification. For example, some polysilazanes gradually break the silicon nitrogen bonds and recombine to form a more stable cross-linked network structure at high temperatures of several hundred degrees Celsius, ultimately transforming from a liquid or flowable state to a solid state, forming cured products with certain strength and heat resistance properties. The temperature, heating time, and other conditions during the thermal curing process have a significant impact on the properties of cured polysilazane. Generally, these parameters need to be precisely controlled according to the specific type and application requirements of polysilazane.
Photocuring
UV curing: After adding a suitable photoinitiator to some polysilazane systems, under UV irradiation, the photoinitiator absorbs UV energy to produce active species such as free radicals. These active species will trigger reactions on the molecular chains of polysilazane, promoting cross-linking and solidification. This curing method has the advantages of fast curing speed, can be carried out at room temperature, and is suitable for heat sensitive substrate materials. It is often used in temperature demanding scenarios such as surface coatings of electronic devices, and can form a curing film in a short period of time, playing a protective and insulating role.
Visible light curing: With the development of light curing technology, some specially designed and modified polysilazanes can also be cured under visible light. Its principle is similar to UV curing, but it utilizes visible light energy, which is relatively more friendly to operators and the environment, avoiding potential harm caused by UV light, and has better applicability in some fine processing fields that require specific lighting conditions.
moisture cure
If there are specific active groups, such as some hydrolyzable groups, in the polysilazane molecule, hydrolysis reaction will occur when it comes into contact with moisture in the air, and the hydrolysis products will further condense and crosslink, thereby achieving solidification. For example, polysilazane containing silane oxygen groups reacts with water in the air and undergoes a series of chemical changes to gradually form a three-dimensional cross-linked network structure. The cured polysilazane can be used in sealing, moisture-proof and other application scenarios. In the field of electronic packaging, its moisture curing properties can be utilized to seal electronic components and prevent damage caused by moisture.
Catalyst solidification
Adding specific catalysts can trigger the curing reaction of polysilazane. For example, some metal organic compound catalysts can reduce the activation energy for crosslinking reactions of polysilazane, allowing curing reactions that originally required higher energy or longer time to occur smoothly under milder conditions. Different types and amounts of catalysts will have different effects on the curing rate and properties of cured polysilazane, and it is necessary to make reasonable choices and optimizations based on actual application goals and process requirements.
Crosslinking agent curing
Adding a suitable crosslinking agent to the polysilazane system, the active functional groups on the crosslinking agent will react chemically with the corresponding functional groups on the polysilazane molecular chain, thereby crosslinking the polysilazane molecules and achieving solidification. Like some organic silicon crosslinking agents containing multiple functional groups, after mixing with polysilazane, a crosslinking network is constructed through chemical reactions such as hydrosilylation and condensation to enhance the comprehensive properties such as hardness, toughness, and chemical resistance of the cured polysilazane. They are commonly used in the preparation of high-performance polysilazane based composite materials.

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