Extremely Low Vapor Pressure, Achieving Ultra-Low Mass Loss
Due to the introduction of fluorine atoms (—CF₃, —CF₂H) into the polysiloxane main chain of its molecular structure, fluorosilicone oil significantly reduces intermolecular forces and volatility. In a high vacuum environment of 10⁻⁶ Pa, its mass loss rate can be controlled to below 1%, far superior to ordinary silicone oil (approximately 5–8%) and mineral-based greases (up to 8–12%). This characteristic allows it to maintain a stable lubrication amount during long-term on-orbit missions, preventing dry friction and failure caused by volatilization.

Effective Suppression of CVCM Contamination, Ensuring the Operation of Precision Systems
Fluorosilicone oil has extremely low volatile condensable material (CVCM) content (<0.01%), significantly reducing the deposition of condensates on optical lenses, star trackers, laser communication terminals, circuit boards, and bearing surfaces. This advantage directly improves the reliability of critical spacecraft subsystems:

Prevents decreased light transmittance and optical path deviation in optical systems
Prevents short circuits in electronic devices due to the formation of conductive films
Maintains the motion accuracy and lifespan of micro-motion mechanisms (such as reaction wheels and robotic arms)
Structural Stability Supports Adaptability to Extreme Environments
The main chain of fluorosilicone oil consists of Si–O–Si bonds, and the side chains contain fluoroalkyl groups, combining the thermal stability of siloxanes (temperature range: –80°C to +250°C) with the chemical inertness of fluorocarbon chains. This structure allows it to maintain molecular integrity in complex extreme environments such as space radiation, atomic oxygen erosion, and high and low-temperature cycles, and it is not easily cracked or produces corrosive byproducts (such as HF), superior to traditional fluoroether oils and perfluoropolyethers (PFPE) in certain low-temperature fluidity scenarios.

China's Aerospace Industry Has Achieved Independent Application and Technological Breakthroughs
Sinopec Lubricant Company has successfully developed and mass-produced fluorosilicone-based lubricating materials such as perfluorocarbon grease and polyperfluoroisopropyl ether grease, breaking the foreign monopoly. These materials are widely used in critical components such as satellite attitude control mechanisms, spacecraft sealing systems, space station propulsion valves, and navigation gyroscopes, supporting the long-term stable operation of the Chinese space station. The Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, has verified the tribological performance and durability of fluorosilicone-based lubricating films under real space conditions (ultra-high vacuum + atomic oxygen + microgravity) through space exposure experiments.

Its vacuum compatibility is recognized by international space standards.
Organizations such as NASA and ESA set strict limits on outgassing rates in spacecraft material selection specifications (such as MSFC-3679). Due to its low volatility and low contamination characteristics, fluorosilicone oil is listed as one of the preferred materials for lubrication and sealing in high-vacuum systems. It is widely used in spacecraft connectors, O-rings, and gearbox lubrication, and is a core material for meeting the long-life requirements of deep space exploration missions.