With the rapid development of the new energy vehicle (EV) industry, the performance requirements for high-voltage cable materials are also increasing. Fumed Silica Reinforced Silicone Rubber has become the first choice for high-voltage cable insulation materials due to its excellent electrical insulation, thermal stability and mechanical strength.
What is Fumed Silica Gel?
Fumed Silica Gel Silicone Rubber is a composite material formed by uniformly dispersing nano-scale fumed silica (Fumed Silica) in a silicone rubber matrix. Fumed silica has a high specific surface area (usually 90m²/g–417 m²/g) and abundant surface hydroxyl groups, which can form strong physical and chemical interactions with silicone rubber molecules, thereby significantly enhancing the mechanical properties and thermal stability of silicone rubber.
Vapor-mixed silicone rubber has extremely high volume resistivity (about 10^13 Ω·cm) and dielectric strength, which can effectively prevent electrical breakdown and leakage, ensuring the safe operation of high-voltage cables in high-voltage environments.
The material can remain stable at temperatures up to 300°C, suitable for high-temperature environments near motors and batteries in new energy vehicles, ensuring the reliability of cables under extreme working conditions.
Nano-scale fumed silica particles as reinforcing fillers significantly improve the tensile strength and tear resistance of silicone rubber, while maintaining good flexibility to adapt to the bending and installation requirements of cables in narrow spaces.
Vapor-mixed silicone rubber has good resistance to ozone, ultraviolet rays and chemical corrosion, extending the service life of cables and reducing maintenance costs.
| Performance indicators | Gas Phase compounding Silicone | XLPE (Cross-linked Polyethylene) | TPE (Thermoplastic Elastomer) |
| Maximum temperature resistance | About 300℃ | Max 150℃ | 105℃ |
| Electrical insulation performance | Excellent | Good | Fair |
| Flexibility | Excellent | Fair | Good |
| Aging resistance | Excellent | Fair | Fair |
| Environmental protection | Excellent (halogen-free) | Fair (some halogen) | Good (can be halogen-free) |
Gas phase mixed silicone is superior to traditional materials in terms of high temperature, electrical insulation, mechanical strength and environmental protection, and is particularly suitable for the application needs of high-voltage cables for new energy vehicles.
