What Distinction Do White Corundum And Tabular Corundum Have

White corundum is a common abrasive in the abrasive market. It has the characteristics of high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance and stable thermal performance.

Tabular corundum is widely used in high-performance refractories, which are used in many fields, such as steel, casting, petrochemicals and ceramics. Tabular corundum has become the leading product of high purity alumina aggregate due to its high refractoriness, thermal shock resistance, creep resistance and excellent wear resistance.

Tabular corundum is a dense aggregate composed of 50-400μm large grain sintered α -al2o3. The name derives from the plate-like shape of its grains.

Tabular corundum is prepared by fast firing ultrafine α -al2o3 pellets at slightly lower melting temperature. After heat treatment, the 20mm or so balls are broken and ground to obtain various sizes. Due to the sintering process, tabular corundum (T60/T64) exhibits very uniform properties, such as low impurity content, high volume specific gravity, and low porosity. It is superior to other natural and synthetic materials such as fused corundum.

The production process of tabular corundum provides a very uniform alumina aggregate, while the cooling of the fused alumina blocks results in a very uneven product. Rapid cooling outside results in fine grains, while slow cooling near the center results in coarse grains. Impurities with the lowest melting point accumulate in the center of the frit. Because the hardness of β -al2o3 is lower than α -al2o3, β -al2o3 aggregates in the fine powder of fused alumina.