Vice-white corundum is our CO.LTD ,developed high-class brown aluminium oxied , which is name is from the chemical composition and pgsical properties ,which are close to white aluminium oxide .It has high gardness as white aluminium oxide ,high toughness ass brown corundum .It is a kind of highgrade refractory products and a abrasives Volume Density ≥3.8g/cm.The degree of　Refractory ≥1850 °C．