Fluorosilicone oil shows excellent stability in extreme temperature environments (-50℃ to 300℃) and has important application potential in the aerospace field. The specific analysis is as follows:

I. Stability at extreme temperatures
‌Low temperature stability‌
Fluorosilicone oil maintains good performance in low temperature environments, and its lower effective working temperature can reach ‌-60℃‌. It can still maintain elasticity and physical properties at low temperatures of -50℃, ensuring that the material does not become brittle or fail in extremely cold environments (such as high altitude or space). 

‌High temperature stability‌
‌Conventional heat resistance range‌: Fluorosilicone oil can withstand temperatures of ‌200℃–250℃‌ in an open system for a long time, and can withstand ‌240℃‌ in a short term.
‌High temperature oxidation resistance‌: By adding heat stabilizers such as iron, titanium or rare earth oxides, its heat resistance can be further improved to ‌250℃‌, which is significantly better than traditional ester aviation lubricants (increased by more than 50℃).
‌300℃ adaptability‌: Existing studies have shown that fluorosilicone oil may experience oxidation aging above ‌250℃‌, and its long-term stability at ‌300℃ remains to be verified, but antioxidant optimization is expected to improve its extreme heat resistance.
‌Chemical resistance and medium stability‌
Fluorosilicone oil has excellent tolerance to jet fuel, hydraulic oil, acidic and alkaline solvents, etc., and can resist non-polar medium erosion for a long time in the range of -68℃ to 232℃, with minimal volume change and physical property attenuation.

2. Application potential in the aerospace field
‌Sealing materials‌
Used to manufacture sealing gaskets and O-rings for rocket propellant tanks, missile warheads, and aircraft connectors, ensuring air tightness under high pressure, fuel corrosion, and temperature fluctuations from -50℃ to 250℃.

‌Fuel system components‌
As the core material for fuel pipelines, fuel tank seals, and pressure regulating pipeline diaphragms, it resists jet fuel erosion and maintains sealing reliability in low-temperature to high-temperature environments.

‌Engine key components‌
Applicable to high-temperature and high-pressure parts such as turbine seals and piston ring seals, providing long-lasting lubrication and sealing under oil and mechanical stress8.

‌Electrical insulation protection‌
Protect spacecraft electronic components from high temperature, chemical media, and ozone/ultraviolet rays, ensuring circuit stability in extreme environments.

‌Special functional components‌
Used to manufacture hydraulic bellows, oil-resistant diaphragms, sensor materials, etc., to adapt to temperature changes and medium corrosion in space environments.

3. Summary and Potential Outlook
Fluorosilicone oil has become an ideal material for aerospace seals, fuel systems, and engine components due to its wide temperature range stability from -60°C to 250°C, excellent chemical resistance, and lubrication performance. Current research focuses on breaking through the long-term use limit of 250°C through antioxidant optimization10. If progress can be made in stability at 300°C, its application prospects in hot-end components of ultra-high-speed aircraft (such as engine bearing lubrication and high-temperature coatings) will be further expanded.