- The melting point of high temperature resistant graphite is 3850℃±50℃, and the boiling point is 4250℃. Even if it is burned by ultra-high arc, the loss of quality is very small, and the coefficient of linear expansion is also very small. The strength of graphite increases with the increase of temperature. At 2000 ℃, the strength of graphite doubles. Magnesia-carbon bricks for converters
- Electrical and thermal conductivity. The conductivity of graphite is twice as high as that of ordinary non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. Thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite acts as a thermal insulator.
- Lubricity. The lubricity 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, acid resistance, alkali resistance, corrosion resistance of organic solvents.
- Plasticity. Graphite has good toughness and can be rolled into very thin flakes.
- Thermal shock resistance. When used at high temperature, graphite can withstand severe changes in temperature without damage. When the temperature changes suddenly, the volume of graphite changes little, and cracks will not occur.
The binder plays the role of connecting the matrix and the particles. In the actual production and use process, the matrix and the binder system are the two weak links of magnesia-carbon bricks.