Xintai Refractory’s Zirconia Corundum Bricks (AZS Bricks) are premium high-performance refractory bricks primarily used in the glass industry. They are composed of high-purity aluminum oxide (Al₂O₃), industrial zirconia (ZrO₂), and silicon dioxide (SiO₂), forming a strong, dense, and thermally stable material after melting and cooling in an electric furnace. The bricks exhibit a eutectoid structure of zirconia corundum and plagioclase with a glass phase filling the inter-crystal gaps, providing exceptional resistance to molten glass corrosion, thermal shock, and high-temperature wear. Xintai Refractory provides both standard and custom AZS bricks, ensuring reliable performance for glass melting furnaces and other high-temperature applications.
Technical Specifications
| Item | AZS41 | AZS36 | AZS33 |
|---|---|---|---|
| SiO₂, % | 12 | 13 | 15 |
| Al₂O₃, % | Remainder | Remainder | Remainder |
| ZrO₂, % | 41 | 36.5 | 33.5 |
| Fe₂O₃ + TiO₂ + CaO + MgO + Na₂O + K₂O, % | ≤2.0 | ≤2.0 | ≤2.0 |
| Bulk Density, g/cm³ | 4.05 | 3.9 | 3.8 |
| Apparent Porosity, % | 0.6 | 0.8 | 0.7 |
| Initial Precipitation Temperature of Vitreous Phase, ℃ | 1400 | 1400 | 1400 |
| Vitreous Phase Exudation, % (1500℃ × 4h) | 1.5 | 2.3 | 2.0 |
| Anti-molten Glass Erosion Speed under Static Condition, mm/24h (1500℃ × 36h, ordinary soda-lime glass) | 1.2 | 1.3 | 1.4 |
| Bubble Release Rate, % (1300℃ × 10h, ordinary soda-lime glass) | 0.6 | 1.0 | 1.2 |
Key Features
High Compression Strength: Exceptional mechanical stability under load, preventing structural failure.
Top High-Temperature Capability: Suitable for continuous operation in molten glass furnaces.
Excellent Thermal Stability: Maintains structural integrity under rapid temperature fluctuations.
Low Thermal Conductivity: Minimizes heat loss and improves energy efficiency.
Penetration Resistance: Strong protection against infiltration of molten glass.
Erosion Resistance: Outstanding resistance to corrosion by molten glass and chemical slag.
Durable Glass Melt Performance: Ensures long service life in high-stress areas of glass melting furnaces.
Typical Applications
Glass Industry: Lining of glass melting furnaces, glass flow channels, and tank components.
Special High-Temperature Equipment: Areas exposed to strong chemical attack by molten glass or slag.
Other Industries: Applications requiring thermal shock resistance and high abrasion resistance at elevated temperatures.
Production Details
Raw Materials: Industrial alumina and zirconia (baddeleyite) are mixed with minimal SiO₂ and other additives.
Melting: Raw materials are melted in an electric furnace at extremely high temperatures.
Casting & Cooling: Molten material is cast into molds and slowly cooled for structural stability.
Annealing & Machining: Bricks undergo controlled annealing and machining to meet precise dimensions and specifications.
Finished Product: High-density, low-porosity, and corrosion-resistant Zirconia Corundum Bricks ready for industrial use.
Packing and Shipping Details
Packing: Stacked on pallets and wrapped with protective materials for safe transport.
Shipping Time: 7–35 working days, depending on order size and destination.
Global Shipping: Available worldwide with full export documentation.
Samples: Free samples can be provided for evaluation.
Frequently Asked Questions (FAQ)
Q1: What is the maximum temperature AZS bricks can withstand?
They are capable of operating at temperatures exceeding 1400°C with excellent dimensional stability.
Q2: Can these bricks be customized?
Yes. Xintai Refractory offers custom shapes, sizes, and zirconia content to meet specific industrial requirements.
Q3. Are Zirconia Corundum Bricks resistant to molten glass corrosion?
Absolutely. The dense ZrO₂–Al₂O₃–SiO₂ structure and glass phase provide superior resistance to molten glass and slag.
Q4: Which industries typically use AZS bricks?
Primarily the glass industry, including glass furnaces and flow channels. They are also used in any high-temperature industrial equipment exposed to aggressive melts.
Q5: How do I place an order or request a sample?
Contact Xintai Refractory via email or inquiry form. Free samples and full technical guidance are available.
