... quality,purity and stability, and the bulk density of ceramic products, mohs hardness and ability to withstand voltage,etc. Taking the superior industrial alumina ... with scientific calcine.The advantages are as follows: less trash, high transfer rate, stable contraction, and great variety of goods. The ... : Al2O3SiO2Fe2O3Na2OThe proportion of true(g/cm3)alpha-Al2O3 (%)1≥99.7≤0.04≤0.05≤0.05≥3.96≥962 ...