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Alumina/Zirconia Hollow Ball Bricks | High-Strength Insulation Refractories for Direct Contact
1. Bulk Density: ≤ 2.50 g/cm³
2. Standard Size: 230*114*65mm
3. Benefits:
• High-Temperature Resistance and Strength
• Lightweight and Energy Efficient
• Thermal Stability and Corrosion Resistance
Manufactured from alumina/zirconia hollow spheres as the primary raw material through pressing and sintering, these refractory bricks offers excellent thermal insulation. It is suitable for lining high-temperature kilns and furnaces that demand stringent purity requirements.
Beyond shaped products, we also supply unshaped refractories such as hollow ball castables, which are used for monolithic lining of complex-shaped kilns or as a back-up insulation layer. Additionally, we offer hollow ball loose fill (or bulk insulation fill) for use as a filling insulation layer between the kiln shell and the working lining, or as insulation filler in vacuum high-temperature furnaces.
Alumina Hollow Ball Bricks: Serving as high-temperature linings for industrial kilns and furnaces, and used to manufacture setter plates for product firing.
Zirconia Hollow Ball Bricks: Provide superior refractory performance, ideal for linings in ultra - high temperature kilns/furnaces.
| Properties ⁄ Products | Al₂O₃(%) | Fe₂O₃(%) | ZrO₂(%) | MgO (%) |
Bulk Density (g/cm³) |
Cold CrushingStrength(MPa) | Refractoriness Under Load T0.5 (℃) |
Linear Change Rate (%) |
Themal Expansion 1500℃ (%) |
Thermal conductivity (W/(m-K)) |
|
| Bubble Alumina Block | BA-85 | ≥85 | ≤0.5 | / | / | 1.4-1.7 | ≥12 | ≥1650 | ≤0.3 | ~0.78 | ≤0.8 |
| BA-90 | ≥90 | ≤0.2 | / | / | 1.4-1.7 | ≥10 | ≥1700 | ≤0.3 | ~0.80 | ≤1.3 | |
| BA-95 | ≥95 | ≤0.2 | / | / | 1.4-1.7 | ≥9 | ≥1700 | ≤0.3 | ~0.83 | ≤1.4 | |
| BA-99 | ≥99 | ≤0.2 | / | / | 1.4-1.7 | ≥9 | ≥1700 | ≤0.3 | ~0.86 | ≤1.5 | |
| Bubble Zircon Block | BZ-99 | / | / | ≥90 | / | 2.00-2.50 | ≥25 | ≥1700 | / | ~0.80 | ≤1.5-2.0 |
In practical applications, selection should be based on comprehensive evaluation of glass composition, melting temperature, design lifespan and other parameters. We provide professional material selection services including performance parameter analysis, service life prediction, and cost-benefit evaluation. Request a quote now!
