氧化铝空心球砖
氧化铝空心球砖
型号
85
90
95
99
较高使用温度°C
1680
1700
1750
1650
1680
1700~1800
Al?O?
≥85
≥90
≥95
≥99
≥99
≥99
SiO2
≤15
≤8
≤4
≤0.2
≤0.2
≤0.2
Fe?O?
≤0.2
≤0.2
≤0.2
≤0.2
≤0.2
≤0.2
体积密度g/cm3
1.4~1.7
1.4~1.7
1.4~1.7
1.3
1.4
1.5~1.7
常温耐压强度Mpa
≥12
≥10
≥10
≥7
≥8
≥10
荷重软化开始温度°C
≥1650
≥1700
≥1700
≥1600
≥1650
≥1700
重烧线变化率%1600°CX3h
±0.3
±0.3
±0.3
±0.3
±0.2
±0.2
热膨胀系数
7.8
8.0
8.2
8.0
8.0
8.2
导热系数w/mk800°C
≤0.6
≤0.7
≤0.8
≤0.8
≤0.9
≤1.3