+86-15527482889
Hot Products
0102030405
Sintered AZS Brick Suppliers in China | High-Quality Zircon Alumina Brick from Factory for Industrial Kilns
Core Advantages
Dense Structure, Low Porosity & Impermeability
High-temperature sintering process creates a dense crystal structure with apparent porosity ≤18% and bulk density ≥3.0g/cm³, which can effectively block the penetration of corrosive media such as slag and glass melt, reduce material loss and extend service life.
Superior Corrosion Resistance
The core components ZrO₂ and Al₂O₃ form a stable eutectic structure, which has strong resistance to molten glass, molten steel, acid-alkali media, etc., especially suitable for glass furnaces against glass melt erosion and metallurgical furnaces against slag scouring scenarios.
Excellent Thermal Shock Resistance
Relying on the phase change toughening characteristics of ZrO₂, it can effectively absorb thermal stress generated by drastic temperature changes, prevent crack propagation, and is not easy to crack and peel under frequent heating and cooling conditions, suitable for kiln start-stop and temperature fluctuation scenarios.
Product Parameters
| Item | Sinter AZS Brick | |
| ZrO₂ % | ≥30 | ≥33 |
| Al₂O₃ % | 48 | 48 |
| SiO₂ % | ≤22 | ≤19 |
| Fe₂O₃ % | ≤0.3 | ≤0.3 |
| Bulk Density (g/cm³) | ≥3.0 | ≥3.2 |
| Apparent Porosity (%) | ≤18 | ≤17 |
| Cold Crushing Strength (MPa) | ≥100 | ≥100 |
| Refractoriness Under Load T0.6 ℃ (0.2MPa) | ≥1680 | ≥1700 |
Note: The above are standard parameters. Sintered zirconium corundum brick products with special specifications and performance indicators can be customized according to customers' specific working condition requirements.
Detailed Application Scenarios
1
Glass Industry (Core Application Field)
As a core special refractory material for glass furnaces, sintered zirconium corundum brick (AZS refractory brick) relies on excellent glass melt corrosion resistance, alkali vapor corrosion resistance and super thermal shock resistance, and is widely used in key load-bearing and contact parts of various glass production kilns. It can effectively ensure the continuity and stability of glass production, significantly improve the purity and surface quality of glass products, and reduce kiln maintenance frequency.
◎ Float glass furnaces: Key parts such as middle-layer bricks, arch foot bricks, channel sidewalls and bottom bricks of melting pools. Sintered zirconium corundum brick can effectively resist long-term scouring and chemical corrosion of molten glass melt, reduce the generation of bubbles and impurities in glass melt, ensure the flatness, light transmittance and dimensional accuracy of float glass, and extend the overall service life of float glass furnaces.
◎ Pharmaceutical glass furnaces: Special sintered zirconium corundum bricks for linings of melting zones and clarification zones of kilns. They accurately meet the strict requirements of pharmaceutical glass for raw material purity and stability, can effectively avoid refractory impurities from penetrating into glass melt, and ensure the safety and compliance of pharmaceutical glass from the source.
◎ Glass Fiber Kilns & Rock Wool Fiber Kilns: Sintered zirconium corundum bricks are used in high-temperature and high-scouring parts such as melting pools and flow holes. They can withstand continuous impact and corrosion of high-temperature molten materials, greatly extend the service life of kilns, reduce equipment shutdown and maintenance costs, and improve fiber production efficiency.
◎ Daily-Use Glass / Special glass furnaces: Customized sintered zirconium corundum bricks for core parts such as melting pools and feed channels. They can adapt to high-temperature and strong corrosion working conditions of different composition glass melting, and meet the efficient production needs of various products such as daily-use glass and special functional glass.
2
Metallurgical Industry
In the process of iron and steel, non-ferrous metal smelting, sintered zirconium corundum brick can withstand the dual corrosion of high temperature, molten metal liquid and slag, has high mechanical strength and structural stability, provides reliable lining protection for metallurgical kilns, extends the service life of furnace bodies, and reduces the risk of production interruption.
◎ Iron and Steel Smelting: Slag lines of ladles, linings of converters, sliding nozzles and lining bricks around submerged nozzles. They can effectively resist scouring and chemical corrosion of molten steel and slag, reduce furnace body loss, and ensure the continuous progress of smelting process.
◎ Non-Ferrous Metal Smelting: Linings of aluminum, copper and other metal melting furnaces and lining bricks of casting systems. They adapt to the high melting temperature and strong corrosion working conditions of non-ferrous metals, and avoid production accidents caused by lining damage.
◎ Metallurgical Auxiliary Equipment: Partition bricks of regenerators, linings of hot blast stoves and other parts. They can withstand scouring and temperature fluctuation of high-temperature flue gas, and improve the thermal efficiency and stability of equipment.
3
Ceramic Industry
In the ceramic production process, sintered zirconium corundum brick is suitable for key parts of high-temperature equipment such as ceramic frit glaze kilns and high-end ceramic firing kilns. It can withstand frequent heating and cooling cycles, maintain structural stability, and help improve the firing quality and output of ceramic products.
◎ Ceramic Frit Kilns: Linings of melting pools and lining bricks of discharge ports. They can resist corrosion and scouring of molten glaze, ensure the purity and uniformity of frits, and improve the quality of ceramic glaze surfaces.
◎ High-End Ceramic Firing Kilns: Kiln inner walls and kiln furniture lining bricks. They have excellent thermal shock resistance, are not easy to crack under frequent kiln start-stop conditions, reduce kiln furniture loss, and ensure the consistency of ceramic product firing.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions (FAQ)
Q
What is sintered AZS brick, and what are its main chemical components?
Sintered AZS brick (Sintered Zirconium Corundum Brick) is a high-performance refractory material composed primarily of ZrO₂ (zirconia) and Al₂O₃ (alumina), with a controlled amount of SiO₂. The standard grades contain ZrO₂ ≥30% or ≥33%, Al₂O₃ at approximately 48%, and SiO₂ ≤22% or ≤19%. These components form a stable eutectic crystal structure through high-temperature sintering, giving the brick its exceptional corrosion resistance, high density, and mechanical strength.
Q
What makes sintered AZS brick suitable for glass furnace applications?
Sintered AZS brick is ideal for glass furnaces because of its outstanding resistance to glass melt erosion and alkali vapor corrosion. Its low apparent porosity (≤18%) and high bulk density (≥3.0 g/cm³) prevent molten glass from penetrating the brick structure, reducing contamination and bubble formation. It is widely used in float glass furnaces, pharmaceutical glass furnaces, glass fiber kilns, and special glass furnaces for parts such as melting pool sidewalls, arch foot bricks, and channel linings.
Q
How does sintered AZS brick achieve excellent thermal shock resistance?
The thermal shock resistance of sintered AZS brick is primarily derived from the phase transformation toughening mechanism of ZrO₂. During rapid temperature changes, ZrO₂ undergoes a controlled phase transformation that absorbs thermal stress and inhibits crack propagation within the material. This allows the brick to withstand frequent heating and cooling cycles — such as kiln start-up and shutdown operations — without cracking or spalling, significantly extending its service life in thermally demanding environments.
Q
Can sintered AZS bricks be customized for specific working conditions?
Yes. While standard sintered AZS bricks are available in grades with ZrO₂ ≥30% and ≥33%, custom formulations with special specifications, dimensions, and performance indicators can be produced to meet specific working condition requirements. Whether you need bricks for extreme-temperature metallurgical environments, high-purity pharmaceutical glass production, or specialized ceramic kilns, our engineering team can develop tailored solutions to match your exact operational demands.
Q
What are the key differences between sintered AZS brick and fused cast AZS brick?
Sintered AZS brick is produced through a high-temperature sintering process, which results in a dense, uniform microstructure with low porosity, good thermal shock resistance, and consistent mechanical properties at a more accessible cost. Fused cast AZS brick is manufactured by melting raw materials and casting them into molds, producing an extremely dense, glassy-phase-rich structure with higher corrosion resistance in severe glass melt contact zones. Sintered AZS is preferred for applications requiring thermal shock resistance and structural stability, while fused cast AZS is typically chosen for the most aggressive glass melt erosion environments.
Q
In which metallurgical applications is sintered AZS brick most commonly used?
In the metallurgical industry, sintered AZS brick is most commonly applied in iron and steel smelting — specifically for ladle slag lines, converter linings, sliding nozzles, and submerged nozzle surrounds — where it must resist intense scouring from molten steel and slag. It is also widely used in non-ferrous metal smelting furnaces for aluminum and copper, as well as in metallurgical auxiliary equipment such as regenerator partition bricks and hot blast stove linings. Its combination of high cold crushing strength (≥100 MPa), high refractoriness under load (≥1680°C), and excellent corrosion resistance makes it a reliable choice across diverse metallurgical processes.