Electrical contact materials play an important role in instruments and electrical switches. With the development of high-voltage power transmission and transformation to large capacity and ultra-high voltage, the improvement of automation level and sensitivity of low-voltage power distribution system and control system, as well as the renewal of electronic industrial products, have put forward new requirements for electrical contact materials.

Phenolic resin refers to a polycondensate synthesized by phenols and aldehydes under the action of an acidic or basic catalyst, which has excellent adhesion, excellent heat resistance, unique ablation resistance and good flame retardancy. Widely used in aircraft and aviation, military equipment, automotive and transportation, construction and other aspects.

Cemented carbide is a kind of alloy material which is made by powder metallurgy process, with high hardness and refractory metal carbide powder (WC, TiC, TaC, NbC, etc.) as the main phase and transition metal cobalt, nickel as the binder phase. With high hardness, high strength, high toughness, wear resistance, high temperature resistance and small expansion coefficient, it is widely used in cutting, drilling, mining, tool forming and wear-resistant parts and other fields.

The structure of carbon nanotubes is particularly a tube composed of a hexagonal network similar to graphite. The unique nano-hollow structure and closed helical structure with different topological configurations make it have a lot of special excellent properties. Such as good electrical conductivity, heat resistance, high mechanical strength, corrosion resistance, self-lubricating and biocompatibility, etc.