以铝矾土和氧化铝粉为原料，在电弧炉中熔融，加入还原剂和稳定剂，延长结晶温区，使晶体充分完整生长。和普通刚玉相比具有硬度高，强度高，锋利度好等特点。
　　Bauxite and alumina powder were used as raw materials to melt in the electric arc furnace, the reducing agents and stabilizers were added to prolong the crystallization temperature zone and make the crystal grow fully and completely. Compared with common corundum, it has the characteristics of high hardness, high strength and good sharpness.