項(xiàng)目 | 高純剛玉磚 | 99剛玉磚 | 90剛玉磚 | 剛玉莫來石磚 |
---|---|---|---|---|
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 |
體積密度g/cm3 | ≥3.15 | ≥3.25 | ≥3.1 | ≥2.9 |
顯氣孔率% | <18 | <18 | <18 | <18 |
常溫耐壓強(qiáng)度MPa | >100 | >100 | >120 | >120 |
荷重軟化開始溫度℃(0.2MPa,0.6%) | >1700 | >1700 | >1700 | >1700 |
重?zé)€變化率%(1600℃ x 8h) | -0.2 | -0.2 | 0.2 | 0.2 |
熱膨脹系數(shù)x 10-6 (室溫Room temp. to 1300'C) | 8.1 | 8.1 | 8.1 | 7.6 |