Zirconia refractory bricks are refractory products containing a high proportion of zircon-based components, typically zircon sand (ZrSiO₄) and zirconia-related phases. Compared with ordinary alumino-silicate refractories, zirconia bricks exhibit:
Superior resistance to molten glass corrosion
Low wettability with glass melts
Excellent chemical stability under weakly acidic conditions
Stable volume at elevated temperatures
（1）Exceptional corrosion resistance against molten glass, slags, and chemical media
（2）High ZrO₂ content (33-41%) for superior high-temperature stability (up to 1800℃ continuous service)
（3）Dense fused cast structure with low porosity (≤3%) and high bulk density (3.6-3.8 g/cm³)
（4）Strong wear resistance to prolong service life in high-traffic industrial applications
（5）Non-toxic and environmentally friendly, compliant with global refractory safety standards
（1）Glass furnace pool walls, feeder channels, and spout linings
（2）Chemical melting reactor linings and molten salt crucible linings
（3）Metallurgical ladle linings and secondary refining furnace components
（4）Special high-temperature furnace linings (ceramic sintering, electronic component annealing)
（5）Tin bath linings for float glass production lines
（6）Corrosion-resistant linings for acid-alkali high-temperature pipelines and valves
Zirconia refractory bricks are premium refractory materials engineered for high-temperature industrial furnaces where chemical corrosion resistance, dimensional stability, and long service life are critical. Manufactured primarily from high-purity zircon-based raw materials, these bricks are widely used in glass melting furnaces, metallurgical furnaces, and chemical kilns.
At Highland Refractory, zirconia refractory bricks are designed to balance performance and cost, offering an ideal solution between conventional high alumina bricks and high-end fused-cast AZS refractories.
Zirconia refractory bricks are refractory products containing a high proportion of zircon-based components, typically zircon sand (ZrSiO₄) and zirconia-related phases. Compared with ordinary alumino-silicate refractories, zirconia bricks exhibit:
These properties make zirconia refractory bricks especially suitable for glass-contact zones in continuous high-temperature operations.
Zirconia refractory bricks demonstrate strong resistance to molten glass and aggressive chemical environments. Their microstructure effectively limits glass penetration, reducing erosion and extending lining life.
Low wettability with molten glass minimizes sticking, infiltration, and structural degradation—an essential property for furnace sidewalls, throats, and channels.
Zirconia bricks maintain dimensional integrity under prolonged exposure to high temperatures, reducing risks of deformation and structural failure.
Compared with fused-cast refractories, zirconia refractory bricks offer better tolerance to controlled thermal cycling and operational temperature fluctuations.
While offering performance significantly superior to high alumina bricks, zirconia refractory bricks remain more cost-effective than AZS bricks for many furnace zones.
Zirconia refractory bricks are commonly used in furnace areas where continuous contact with molten materials and chemical stability are required.
These applications benefit from zirconia bricks’ resistance to chemical attack and stable high-temperature performance.
Compared with high alumina bricks, zirconia refractory bricks provide:
High alumina bricks remain suitable for backup linings or less aggressive areas, but zirconia bricks outperform them in demanding environments.
AZS bricks offer the highest corrosion resistance but at significantly higher cost. Zirconia refractory bricks are often selected when:
Many furnaces adopt a combined lining strategy, using AZS bricks in critical hot spots and zirconia refractory bricks in surrounding zones.
Zirconia refractory bricks are commonly supplied in different grades to match specific operating conditions.
Typical Technical Parameters
| Item | Type A | Type B |
|---|---|---|
| ZrO₂ (%) | ≥65 | ≥65 |
| SiO₂ (%) | ≤33 | ≤33 |
| Fe₂O₃ (%) | ≤0.2 | ≤0.2 |
| Bulk Density (g/cm³) | ≥3.80 | ≥3.75 |
| Apparent Porosity (%) | ≤17 | ≤17 |
| Cold Crushing Strength (MPa) | ≥100 | ≥80 |
| RUL (0.2 MPa, T0.6, °C) | ≥1680 | ≥1650 |
Actual specifications can be optimized according to furnace design and operating conditions.
When selecting zirconia refractory bricks, engineers should consider:
Zirconia bricks are best suited for medium to high-temperature zones with chemical corrosion demands, where cost-effective performance is required without the expense of fused-cast materials.
Proper material zoning and grade selection are essential for maximizing refractory performance.
High-quality zirconia refractory bricks require strict control over:
Consistent manufacturing ensures stable performance and reliable long-term operation in industrial furnaces.
Our zirconia refractory bricks are designed to help customers extend furnace campaign life while optimizing refractory investment.
Every furnace operates under unique conditions. Our technical team provides:
For detailed technical parameters and available zirconia refractory brick grades, refer to the Zirconia Refractory Bricks product page or contact our technical team for assistance.
Zirconia refractory bricks play a vital role in modern high-temperature furnace design. By offering excellent corrosion resistance, thermal stability, and cost-performance balance, they serve as an optimal solution for glass furnaces and other demanding industrial applications.
When selected and applied correctly, zirconia refractory bricks significantly improve furnace reliability, operational stability, and overall economic performance.
Silicon carbide plates are mainly composed of silicon carbide (SiC) as the aggregate (with a content usually ≥ 80%).
