Mainly used in key parts of kilns in steel, electronics, petrochemical, fertilizer, non-ferrous, refractory and other industries

项目 Item	高纯刚玉砖 Ultra Purity Corundum Brick	99刚玉砖 99 Corundum Brick	90刚玉砖 90 Corundum Brick	刚玉莫来石砖 Corundum-Mullite Brick
Al2O3（%）	≥99.3	≥98.5	≥90	≥80
SiO2 (%)	≤0.15	≤0.3	≤8.5	≤18.5
Fe2O3 (%)	≤0.1	≤0.2	≤0.2	≤0.3
体积密度(g/cm3) Bulk Density	≥3.25	≥3.25	≥3.1	≥2.9
显气孔率(%) Apparent Porosity	≤18	≤18	≤18	≤18
常温耐压强度(Mpa) Cold Crushing Strength	≥100	≥100	≥120	≥120
荷重软化开始温度(℃) (0.2Mpa,0.6%) Refractoriness under Load	≥1700	≥1700	≥1700	≥1700
重烧线变化率 (%) Reheating Linear Change Rate	-0.2	-0.2	0.2	0.2
热膨胀系数(x10-6) （室温Room Temp. to -1300℃） Coefficient of Thermal Expansion	8.1	8.1	8.1	7.6
典型应用 Typical Application	主要用于钢铁，电子，石油化工，化肥，有色，耐火材料等行业窑炉的关键部位。 Mainly used in key parts of kilns in steel, electronics, petrochemical, fertilizer, non-ferrous, refractory and other industries