Graphite plugs have the characteristics of high temperature resistance, oxidation resistance, and excellent thermal conductivity. In the process of high temperature use, graphite plugs have a small thermal expansion coefficient and have certain strain resistance to rapid cooling and rapid heating.
Graphite material performance advantages:
- High temperature resistance
The melting point of graphite is 3850±50℃. Even if it is burned by an ultra-high temperature arc, the weight loss is very small, and the thermal expansion coefficient is also small. The strength of graphite increases with increasing temperature, and at 2000°C, the strength of graphite doubles.
- Electrical and thermal conductivity
The conductivity of graphite is one hundred times higher than that of ordinary non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at high temperatures, graphite becomes a thermal insulator.
The lubricating performance of graphite depends on the size of the graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricating performance.
- Chemical stability
Graphite has good chemical stability at room temperature and is resistant to acid, alkali and organic solvent corrosion.