Structural materials in extreme environments
Silicon materials, with their unique molecular structure, show excellent resistance to high temperature, low temperature, chemicals and radiation, and have become key structural materials in the aerospace field. In launch vehicles, satellites and spacecraft, silicone can be resistant to instantaneous high temperature ablation (up to 500°C) and ultra-low temperature (rocket propellant containers must withstand environments below -180°C) through special processes. At the same time, its resistance to space radiation can effectively resist cosmic ray damage to materials. Replacing traditional metal connectors with silicone composites not only reduces the weight of the aircraft by 30%-40%, but also significantly improves the structural strength and reliability. For example, after a certain type of satellite shell is coated with modified silicone resin, it can still remain intact under extreme temperature differences from -200°C to +250°C, and its service life is extended by more than 5 times.

The core of multifunctional bonding and sealing technology
Silicone adhesives and sealants play an irreplaceable role in the assembly of aerospace vehicles. As a mainstream sealing material, room temperature vulcanized silicone rubber (LSR) has an operating temperature range of -60℃ to +350℃, which can achieve seamless bonding of heterogeneous materials such as metal, glass, and ceramics. In aircraft fuel systems, HM804 two-component fluorosilicone sealant has been successfully used for overall tank sealing due to its fuel corrosion resistance and electrical insulation properties, reducing the leakage rate to below 0.1ppm. In response to the electromagnetic interference problem of electronic equipment compartments, conductive silicone sealants achieve ultra-high conductivity with a volume resistivity of less than 0.01Ω·cm by adding silver powder or silver-plated fillers, effectively shielding radar waves and electromagnetic radiation. In addition, the application of flame-retardant and fire-resistant silicone sealants in high-temperature areas such as engine compartments allows components to remain unburned for 15 minutes under a flame of 1093℃, providing double protection for flight safety.

Innovative direction of lightweight and functional integration
With the increasing demand for weight reduction and functional integration of aerospace vehicles, silicone materials are developing in the direction of lightweight, high-strength, and multifunctional composites. By introducing nanostructured reinforcements, the specific strength of silicone composites is increased by 200%, while maintaining a density of only 1/3 of that of metals. In the field of stealth technology, silicone-based absorbing materials can reduce the radar reflection cross section of equipment by 80%, and cooperate with intelligent coating technology to achieve self-repair and self-cleaning functions. In the future, with the mass production of new materials such as liquid silicone rubber (LSR), the proportion of silicone applications in precision components, wearable devices and space exploration equipment will continue to increase, pushing aerospace technology towards a more efficient and safer direction.