The formula design of phenyl silicone oil and inorganic filler to synergistically improve temperature resistance needs to start from three aspects: optimization of phenyl silicone oil molecular structure, screening of inorganic filler types and ratios, and design of synergistic mechanisms. The following is a specific plan and analysis:

1. Optimization of phenyl silicone oil molecular structure
Phenyl content regulation
Low phenyl content (5%-10%): suitable for cold-resistant scenes, can still flow at -70℃, but the temperature resistance is weak.
Medium and high phenyl content (25%-45%): significantly improves high temperature resistance, radiation resistance and lubricity, suitable for high temperature environment.
Functional group modification
Introduction of silicon hydrogen, vinyl group, hydroxyl group, etc.: enhance the chemical bonding between phenyl silicone oil and inorganic filler, enhance the interface bonding force, and optimize the synergistic temperature resistance effect.

2. Screening of inorganic filler types and ratios
High temperature resistant fillers
Nano-silica: improve thermal stability, reduce viscosity changes at high temperatures, and enhance mechanical strength.
Mica powder, talc: improve heat shock resistance and reduce thermal expansion coefficient.
Low melting point glass powder: forms a glass phase at high temperature, enhancing thermal conductivity and temperature resistance.
Nano silicon carbide: improves hardness and wear resistance, and optimizes mechanical stability at high temperature.
Antioxidant filler
Titanium dioxide: acts as a photocatalyst to delay oxidation reaction and extend high temperature service life.
Typical formula example
Methyl phenyl silicone resin 40g, nano silicon dioxide 0.4g, mica powder 2.5g, talcum powder 2g, low melting point glass powder 5g, titanium dioxide 6g, nano silicon carbide 3g: coating hardness 81HD, adhesion 3.5MPa, can withstand 800℃ high temperature.

3. Synergistic mechanism design
Interface chemical bonding
Silicon-hydrogen bond or hydroxyl bond: enhances the interface bonding force between phenyl silicone oil and inorganic filler, and reduces phase separation at high temperature.
Filler network construction
Nanoparticle bridging: forms a three-dimensional network structure to improve thermal conductivity and mechanical stability at high temperature.
Antioxidant synergy
Titanium dioxide and antioxidant: synergistically inhibit oxidation reaction and reduce viscosity changes at high temperature.