High-Durability, Long-Life Zirconia Bricks for Glass Kilns (ZA60, ZA80, ZA90)
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Product Details
Product Introduction: Silica- and sodium-free large-size electrofused high-zirconia bricks (ZA60, ZA80, ZA90) are premium materials ideal for glass melting furnaces. With a density of up to 5.0 g/cm³, these bricks can withstand long-term operating temperatures as high as 2000°C, making them particularly effective in glass applications involving sodium, boron, lead, fluorine, and other areas requiring high electrical resistivity. At temperatures above 1550°C under similar conditions, their service life exceeds that of AZS materials by more than three times. Additionally, they exhibit exceptional resistance to glass melt erosion and scouring, while also demonstrating excellent performance during repeated heating cycles. As a result, these bricks play a crucial role in extending the lifespan of glass furnaces, enabling cost-effective operations, and significantly reducing overall carbon emissions.
Product Details
| Physicochemical Parameters / Products | ZA60 | ZA80 | ZA90 |
| Temperature range | Below 1500°C | 1550°C–2000°C | 1550°C–2000°C |
| Applicable Scenarios | Photovoltaic rolled lip bricks, flow channel box plates, melt-gate bricks, stirring rods, mixing impellers, plungers, and more | Long-life glass furnace pool walls, rotary drums, and areas requiring thermal repair with bonded bricks, among others. | Long-life glass furnace pool walls, pool bottoms, electrode holes, flow channels, and more |
Technical indicators
| Project | Metrics | |||
| ZA60 | ZA80 | ZA90 | ||
| Chemical composition | ZrO2 + HfO2 /% | ≥60 | ≥78 | ≥88 |
| Al2O3/% | ≥35 | ≥15 | ≥0.5 | |
| SiO2/% | ≤0.5 | ≤0.5 | ≤9 | |
| Na2O / % | ≤0.2 | ≤0.2 | ≤0.2 | |
| Room-temperature flexural strength / MPa | ≥200 | ≥300 | ≥350 | |
| Resistance to glass-liquid erosion under static conditions / (mm/24h) (Borosilicate glass, 1600°C × 48h) |
0.07 | 0.04 | 0.03 | |
| Creep Rate (1600℃ × 50h) / % | -0.258 | -0.165 | -0.215 | |
| Bubble evolution rate (borosilicate glass, 1300°C) / % | ≤0.7 | ≤0 | ≤0 | |
| Bubble Emission Rate (Borosilicate Glass, 1500°C) / % | ≤1.5 | ≤0.1 | ≤0.1 | |
| Bulk density / (g·cm⁻³) | ≥4.0 | ≥5.0 | ≥4.8 | |
| Apparent porosity / % | ≤18 | ≤8 | ≤10 | |
| Water-cooled at 1100℃ | ≥25 | ≥3 | ≥3 | |
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