
AZS33-Y is an electrically fused zirconia-alumina brick produced by the oxidation method, containing approximately 33% zirconia. With its dense texture and stable performance, it is a reliable choice for critical high-temperature areas in glass melting furnaces.
Key Features:
High Resistance to Glass Melt Erosion: The approximately 33% zirconia content forms a protective layer upon contact with the glass melt, effectively resisting erosion by sodium-calcium glass and extending the furnace’s service life.
Excellent Thermal Shock Resistance: With a low coefficient of thermal expansion and a uniform crystal structure, it withstands rapid cooling and heating without cracking or spalling.
Extremely Low Contamination: The oxidation process minimizes the leaching of residual carbon and glass phases, ensuring the purity of the molten glass and reducing defects such as stone formation and bubbles.
Tight Joints: CNC precision grinding ensures dimensional accuracy, allowing bricks to interlock tightly and preventing glass melt penetration and upward drilling erosion.
Applications:
Tank wall liquid level lines, tank bottom lining, upper structures, and feed channels. Suitable for bottle and jar glass, tableware glass, and float glass melting furnaces.

| Projects | Physical and chemical indicators | ||||
| AZS33-Y | AZS36-Y | AZS41-Y | |||
| Chemical Composition % | Al2O3 | / | (Margin) | ||
| ZrO2 | / | 32~36 | 35~40 | 40~44 | |
| SiO2 | ≤ | 16 | 14 | 13 | |
| Na2O | ≤ | 1.45 | 1.45 | 1.30 | |
| (Fe2O3+TiO2+CaO+MgO+Na2O+K2O) | ≤ | 2 | 2 | 2 | |
| (Fe2O3+TiO2) | ≤ | 0.3 | 0.3 | 0.3 | |
| Bulk density (g/cm3) | ≥ | 3.75 | 3.80 | 3.95 | |
| Apparent porosity/% | ≤ | 1.5 | 1.0 | 1.0 | |
| Resistance to the erosion rate of molten glass at rest (Ordinary soda-lime glass, 1500°C×36h)/(mm/24h) | ≤ | 1.60 | 1.50 | 1.30 | |
| Initial precipitation temperature of glass phase/°C | ≥ | 1400 | 1400 | 1400 | |
| Bubble precipitation rate (ordinary soda-lime glass, 1300°C×10h)/% | ≤ | 2.0 | 1.5 | 1.0 | |
| Glass phase exudation (1500°C×4h)% | ≤ | 2.0 | 3.0 | 3.0 | |
| Thermal expansion rate (room temperature ~1000°C)/% | ≤ | Provide measured data | |||
| Bulk density(Kg/m3) | PT、QX | > | 3400 | 3450 | 3550 |
| ZWS | > | 3600 | 3700 | 3850 | |
| WS | > | 3700 | 3750 | 3900 | |