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Product category|Insulation Bricks
Al₂O₃: ≥85%
SiO₂: ≤13
Bulk density: 1.2-1.7g/cm³
Cold compressive strength: ≥9MPa
Refractoriness under load: ≥1650
Max service temperature: 1800℃
Online Time: 7*24 hours
Alumina bubble bricks refer to lightweight refractory materials made of refractory hollow balls.
Low porosity
Small thermal conductivity
Good thermal shock resistance
High temperature structural strength
Can be directly laid on the lining of high-temperature kilns in contact with flames, and can be used to manufacture high-temperature furnace tubes, trays, protective covers, etc.
| Al₂O₃% | ≥85 | ≥87 | ≥90 | ≥95 | ≥99 |
| ZrO₂% | 一 | 一 | 一 | 一 | 一 |
| SiO₂ | ≤13 | ≤12 | ≤8 | ≤4 | ≤0.2 |
| FezO₃% | ≤0.3 | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk density g/cm³ | 1.2-1.7 | 1.3-1.5 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 |
| Cold compressive strength | ≥12 | ≥10 | ≥10 | ≥10 | ≥9 |
| Refractoriness under load | ≥1650 | ≥1650 | ≥1700 | ≥1700 | ≥1700 |
| Reheating line changing ratio | ±0.3 | ±0.3 | ±0.3 | ±0.3 | ±0.3 |
| Thermal expansion coefficient | ~7.8 | ~7.8 | ~8.0 | ~8.0 | ~8.6 |
| Thermal conductivity | ≤0.8 | ≤0.8 | ≤1.3 | ≤1.4 | ≤1.5 |
| Max service temperature | 1680 | 1700 | 1700 | 1700 | 1800 |
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