What is The Material of High-Temperature Refractory Brick?

High-temperature refractory brick is a special refractory material, and the choice of its material is closely related to the high-temperature environment it needs to withstand. Generally speaking, high-temperature refractory bricks are mainly composed of oxides or non-oxides with high melting points and high stability to ensure that their physical and chemical properties can remain stable under high-temperature conditions.

Common high-temperature refractory brick materials include siliceous, clay, high alumina, magnesia, chromium, corundum, etc. Among them, siliceous refractory bricks are mainly composed of silicon dioxide, have excellent acid corrosion resistance, and are mainly used in acid furnaces. Clay refractory bricks are made of clay as the main raw material and are fired at high temperatures. They have good thermal stability and thermal shock resistance. High alumina refractory bricks have excellent high-temperature resistance due to their high aluminum content and are widely used in the masonry of high-temperature furnaces.

In addition, magnesia and chromium refractory bricks have excellent alkaline corrosion resistance and oxidation resistance due to their high magnesium and chromium content and are suitable for alkaline furnaces and high-temperature oxidizing atmospheres. Corundum refractory bricks are made of corundum (a high-purity alumina crystal) as the main raw material. They have extremely high refractoriness and hardness and are suitable for use under extremely high-temperature conditions.

In addition to the above common materials, high-temperature refractory bricks may also use composite materials or special processes to improve their performance. For example, by adding a certain amount of high-temperature stable materials such as graphite or silicon carbide, the thermal conductivity and thermal shock resistance of refractory bricks can be improved. At the same time, the use of advanced molding and firing processes can further improve the density and strength of refractory bricks.

It should be noted that the material selection of high-temperature refractory bricks should be determined according to their use environment and requirements. Different furnaces and different working conditions have different performance requirements for refractory bricks, so in actual applications, they need to be selected and used according to specific circumstances.

In summary, high-temperature refractory bricks are made of a variety of materials, each of which has its unique performance and scope of application. By reasonably selecting and using these materials, it can be ensured that high-temperature refractory bricks have good stability and durability in high-temperature environments.