Tabular alumina is a pure, additive-free sintered alumina with a coarse-grained, well-developed α-Al₂O₃ crystal structure. Under SEM, it exhibits a plate-like crystalline structure, featuring small pores with a high proportion of closed pores. Its porosity is roughly equivalent to that of fused alumina. With high purity, excellent volume stability, and minimal re-firing shrinkage, the refractory materials or castables produced from it demonstrate good thermal shock stability and flexural strength after high-temperature treatment.
Physical And Chemical Specifications
Advantage
Ultra-High Temperature Resistance: Refractoriness ≥ 1900℃, with stable volume and maintained strength at high temperatures, making it suitable for extreme high-temperature working conditions.
Excellent Thermal Shock Resistance: The plate-like crystal structure alleviates stress caused by sudden temperature changes, greatly reducing the risk of cracking and spalling, thereby extending the service life of the product.
Strong Chemical Stability: Resistant to erosion by acids, alkalis, salts, and high-temperature melts. It also shows excellent compatibility with refractory phases such as spinel and mullite, making it suitable for diverse formulations.
Application
Tabular alumina can be used as a main component in alumina-carbon, alumina-magnesia-carbon, magnesia-alumina-carbon, magnesia-spinel, and alumina-chrome refractory bricks. It can also be incorporated as an alumina-enriching component into high-alumina unshaped refractory materials. It is widely used in industries such as iron and steel, casting, and ceramics, with its application in the iron and steel industry covering almost the entire process of ironmaking and steelmaking.
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