氧化铝空心球砖主要是以氧化铝空心球为主要原料,以刚玉细粉做添加物,在高温1800度窑炉内烧制而成。它具有抗高温,热稳定性好,保温效果优良等特点。近年来广泛用于高温推板电窑、遂道窑、梭式窑炉等各种高温工业窑炉高温区域。使用效果持久耐用,为企业创造了经济效益。
项目Ltem |
氧化铝空心球砖 Alumina bubble brick |
氧化锆空心球砖Zirconia bubble brick |
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|
85砖 |
87砖 |
90砖 |
95砖 |
99砖 |
98砖 |
AL2O3% |
≥85 |
≥87 |
≥90 |
≥95 |
≥99 |
- |
ZrO2% |
- |
- |
- |
- |
- |
≥98(含稳定剂) |
SiO2% |
≤13 |
≤12 |
≤8 |
≤4 |
≤0.2 |
≤0.2 |
Fe2O3% |
≤0.3 |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.2 |
体积密度g/cm3 Bulk density |
1.2-1.7 |
1.3-1.5 |
1.4-1.7 |
1.4-1.7 |
1.4-1.7 |
2.5-3.5 |
常温耐压强度MPa Cold crushing strength |
≥12 |
≥10 |
≥10 |
≥10 |
≥9 |
≥8 |
荷重软化开始温度℃(0.1MPa ,0.6%) Refractoriness under load |
≥1650 |
≥1650 |
≥1700 |
≥1700 |
≥1700 |
≥1700 |
重烧线变化率%(1600℃x3h) Reheating linear change |
±0.3 |
±0.3 |
±0.3 |
±0.3 |
±0.3 |
±0.2 |
热膨胀系数x10-6(室温-1300℃) Thermal expansion coefficient |
~7.8 |
~7.8 |
~8.0 |
~8.0 |
~8.6 |
~9.1 |
导热系数 w/(m.k)(平均温度800℃) Thermal Conductivity
|
≤0.8 |
≤0.8 |
≤1.3 |
≤1.4 |
≤1.5 |
≤0.3 |
最高使用温度℃ Max service temperature |
1680 |
1700 |
1700 |
1700 |
1800 |
2200 |