Silicone resin: Silicone resin is usually composed of silicon oxygen bonds (- Si-O -) as the main structural unit, with a large number of silicon atoms and oxygen atoms covalently connected in the molecular chain. At the same time, different organic groups (such as methyl, phenyl, etc.) are also connected, relying on the characteristics of silicon oxygen bonds to exhibit a series of properties such as heat resistance, weather resistance, insulation, etc.
Polysilazane: The main chain structure of polysilazane is a silicon nitrogen bond (- Si-N -), which is composed of alternating silicon and nitrogen atoms to form the molecular main chain. It also carries organic functional groups to modify the side chains. However, the presence of silicon nitrogen bonds makes it fundamentally different from silicone resins in terms of chemical properties and reaction activity.
Different performance characteristics
silicone:
In terms of heat resistance: it has good heat resistance, and different types of silicone resins can withstand a certain range of high temperatures. For example, phenyl silicone resin can withstand high temperatures above 300 ℃, and its structure is relatively stable in high temperature environments, maintaining good insulation, mechanical strength and other properties.
In terms of weather resistance, it can effectively resist the influence of natural factors such as ultraviolet rays, wind and rain, and temperature changes. It is not easy to experience aging phenomena such as discoloration, powdering, and cracking when exposed to outdoor environments for a long time. It is suitable for application scenarios such as protective coatings and sealing materials for outdoor buildings and electrical equipment.
In terms of electrical insulation, it has low dielectric constant and dielectric loss, as well as high breakdown voltage, which can effectively provide electrical insulation. It is widely used in the field of electronic and electrical insulation paints, packaging materials, etc.
Polysilazane:
Ceramic precursor characteristics: The most prominent feature of polysilazane is that it can be used as a ceramic precursor and can be converted into ceramic materials under specific conditions such as high temperature. For example, after high-temperature cracking, silicon nitride (Si ∝ N ₄) ceramics can be generated. This ceramic material has excellent properties such as high strength, high hardness, high temperature resistance, and corrosion resistance, and can be used in fields such as aerospace and engine components that require strict material performance.
High reactivity: Due to the presence of silicon nitrogen bonds, it has higher reactivity compared to silicone resin and is prone to react with compounds containing active groups. This makes it more advantageous in applications that require chemical modification or participation in specific chemical reactions to prepare high-performance materials.
Good film-forming properties: Polysilazane can also form high-performance thin films, which can endow the substrate material with good wear resistance, corrosion resistance, etc. in coating applications. However, there are still some differences in the film-forming mechanism and film performance characteristics compared to silicone resin.
Application areas focus on different aspects
Silicone resin: mainly used in the electronic and electrical industry (such as motor insulation, electronic component packaging, etc.), automotive industry (such as spark plug insulation, vehicle body sealing, etc.), construction industry (such as curtain wall sealing, exterior wall waterproofing, etc.), coating and adhesive industry, etc., focusing on its conventional functions of insulation, protection, sealing, decoration, etc.
Polysilazane: It is more commonly used in high-end fields that require ceramic conversion, such as thermal protection coatings for aerospace engines (which achieve high temperature resistance, insulation, and other functions by converting into ceramics), precursors for high-performance ceramic material preparation, etc. At the same time, it also has important applications in some coating fields that require high surface properties of materials (such as wear-resistant and corrosion-resistant coatings on precision instrument surfaces).
Although both polysilazane and silicone resin are organic polymer materials containing silicon, based on their many differences in structure, properties, and application fields, polysilazane cannot be simply classified as silicone resin.
What are the advantages of using polysilazane as a ceramic precursor? What are the synthesis methods of polysilazane? What are the intersections between polysilazane and silicone resin in application fields?

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