High temperature calcined brown corundum is formed by high temperature and medium temperature calcined abrasive in the production process of raw brown corundum, and then annealed.

Its main features are: very small expansion coefficient, good hydrophilicity, high toughness, high strength, and the sintered abrasives made have the characteristics of dark blue color after firing, no mesh cracks, and no rust spots, thus improving The precision and grinding effect of abrasive tools are especially suitable for the production of high-grade bonded abrasive tools.