Zhengzhou Rongsheng Refractory Co., Ltd.
Zhengzhou Rongsheng Refractory Co., Ltd. Refractory manufacturing company.
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Alumina Bubble Brick Introduce
Alumina bubble bricks are made of alumina hollow balls and alumina powder as the main raw materials, combined with other binding agents, and fired at a high temperature of 1750 degrees.It is a kind of ultra-high temperature energy-saving insulation material.Alumina hollow ball bricks have a maximum service temperature of 1800°C and have the advantages of high mechanical strength and low volume density.
| Product name | Alumina bubble brick |
| Operating temperature | 1750 degrees |
| Main raw materials | Alumina hollow ball material |
| Properties | ultra-high temperature, energy saving, thermal insulation |
| Features | Save materials, save energy |
Application of Alumina Bubble Brick
Alumina bubble brick can be used in high-temperature energy-saving (>30%) inverted flame kilns, shuttle kilns, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, nitriding furnaces, etc. It will achieve obvious results in reducing the weight of the furnace body, transforming the structure, saving materials and saving energy.
Alumina Bubble Brick Technical Data
| Item/Index | Alumina Bubble Ball | Zirconia Bubble Ball | Sialon Binding Al2O3 Bubble Bricks | |
| LKZ-88 | LKZ-98 | ZKZ-98 | — | |
| Maximum Service Temperature ℃ | 1650 | 1800 | 2000~ 2200 | 1600 |
| Al2O3 % ≥ | 88 | 99 | – | 70 |
| ZrO2 % ≥ | – | – | 9.8 | – |
| SiO2 % ≤ | – | 0.2 | 0.2 | – |
| Fe2O3 % ≤ | 0.3 | 0.15 | 0.2 | N≥5 |
| Bulk Density g/cm | 1.30~1.45 | 1.40~1.65 | ≤ 3.0 | ≤ 1.5 |
| Cold Crushing Strength MPa ≥ | 10 | 9 | 8 | 15 |
| Refractoriness Under Load ℃ (0.2MPa,0.6%) ≥ | 1650 | 1700 | 1700 | 1700 |
| Reheating Linear Change Rate % 1600℃×3hrs | ±0.3 | ±0.3 | ±0.2 | – |
| Thermal Expansivity ×10 (indoor temperature, ~1300℃) | ~8.0 | ~8.6 | – | thermal shock resistance, times (1100℃water cold)≥15 |
| Thermal Conductivity W/(m.K) ≤ (average temperature 800℃) | 0.9 | 1.0 | 0.5 | 1.1 |