Alumina Hollow Sphere Brick
Alumina hollow sphere bricks have characteristics such as high temperature resistance, low density, low heat capacity, low thermal conductivity, and strong insulation. They can improve the thermal efficiency of kilns, shorten production cycles, reduce furnace weight, and lower energy consumption, making them excellent insulating materials.
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Aluminum
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The Alumina Hollow Sphere Brick is a high-performance refractory material designed for applications requiring excellent thermal insulation, high temperature resistance, and lightweight construction. Manufactured from high-quality alumina, the Alumina Hollow Sphere Brick features a unique hollow spherical structure that reduces weight while maintaining exceptional mechanical strength. This innovative design allows for superior heat retention and energy efficiency, making it ideal for use in kilns, furnaces, and other high-temperature industrial equipment.
The Alumina Hollow Sphere Brick is suitable for a wide range of applications, including glass manufacturing, metallurgical furnaces, cement production, and chemical processing. Key advantages include resistance to thermal shock, high corrosion resistance, and long service life. Its lightweight structure simplifies installation and reduces labor costs without compromising durability or performance. The brick can also be customized to meet specific size, density, and thermal conductivity requirements, ensuring optimal performance for specialized industrial processes. Combining durability, lightweight design, and thermal efficiency, the Alumina Hollow Sphere Brick is a reliable solution for modern high-temperature industrial operations.
| Project Item | Alumina hollow sphere brick | Zirconia hollow sphere brick | ||
| 85 brick | 90 brick | 99 brick | 98 brick | |
| Maximum use temperature ℃ | 1680 | 1700 | 1800 | 2200 |
| Al2O3 % | ≥85 | ≥90 | ≥99 | |
| ZrO2 % | ≥98 (including stabilizer) | |||
| SiO2 % | ≤15 | ≤8 | ≤0.2 | ≤0.2 |
| Fe2O3 % | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk density g/cm³ 3 Bulk density | 1.4-2.0 | 1.4-2.0 | 1.4-2.0 | ≤3.0 |
| Cold compression strength MPa | 8-35 | 8-35 | 8-35 | ≥8 |
| Load softening start temperature ℃ (0.1MPa, 0.6%) Refractoriness under load | ≥1650 | ≥1700 | ≥1700 | ≥1700 |
| Reheating linear change rate % (1600℃×3h) Reheating linear change | ±0.4 | ±0.3 | ±0.3 | ±0.2 |
| Thermal conductivity w/(m·k) (Average temperature 800℃) Thermal Conductivity | 0.8-2.0 | 0.7-1.9 | 0.6-1.8 | ≤0.3 |
Performance: Alumina hollow sphere bricks feature high temperature resistance, low density, low heat capacity, low thermal conductivity, and strong insulation, which can improve kiln thermal efficiency, shorten production cycles, reduce furnace weight, and lower energy consumption. They are excellent insulating materials.
Application: Alumina hollow sphere bricks are suitable for tunnel kilns, shuttle kilns, crucible furnaces, and various electric furnace linings. They are widely used in metallurgy, light industry, chemical, ceramics, glass, electronics, and other industries.
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