The raw material of tabular alumina is alumina powder, which is formed by sintering at a temperature lower than the melting point of corundum in an ultra-high temperature kiln, rapid heating and then rapid cooling. The tabular alumina of different particle sizes that we see every day is formed after fine grinding, shaping and drying. Today, I would like to introduce the performance characteristics of tabular alumina.
In the production process of tabular alumina, no additives are added, so its purity is high and its grain hardness is relatively large. Tabular alumina has high thermal load strength, low thermal shrinkage, high density and low air permeability, and particularly good wear resistance. There are many closed small pores inside the grains of tabular alumina, so it has better thermal shock stability. Tabular alumina is resistant to chemical corrosion. Most alkalis and inorganic acids have no effect on tabular alumina, except hydrofluoric acid and phosphoric acid.
This series of advantages makes tabular alumina an ideal material for refractory raw materials. It can be used not only as an aggregate, but also as an additive to other high-alumina monolithic refractory materials.
Tabular alumina can be used in the application of fused corundum or white corundum to further improve the performance of refractory materials.
Tabular alumina is used in kiln furniture in the ceramic industry to enhance its properties. Such as improving the thermal shock stability and deformation resistance of ceramic rollers; improving the life of saggers and shed plates used for high-temperature ceramics.
In addition, plate-shaped corundum can also be used as an insulator, and can also be used as a low-porosity, high-strength and high-purity catalyst carrier for high-temperature reactions.
