December 22, 2025
Fused zirconia corundum brick is a premium refractory material engineered for applications where extreme temperature, severe chemical corrosion, and long service life are critical requirements. Produced by electric arc furnace fusion, fused zirconia corundum brick is manufactured through complete melting of high-purity alumina and zirconia, followed by controlled casting and annealing. This fusion process creates a dense, uniform microstructure that significantly outperforms sintered refractories in harsh operating environments.
The defining feature of fused zirconia corundum brick is its exceptional resistance to molten glass, aggressive slags, and alkaline vapors. The coexistence of corundum crystals and finely distributed zirconia phases forms a highly stable structure that limits chemical penetration and inhibits material dissolution. This makes fused zirconia corundum brick especially suitable for glass contact zones, high-temperature furnaces, and reactors where conventional alumina bricks suffer rapid erosion.
Thermal stability is another critical advantage of fused zirconia corundum brick. With a refractoriness exceeding 1750°C and excellent high-temperature strength, the brick maintains dimensional stability even under prolonged exposure to extreme heat. The low creep rate under load ensures that furnace linings remain structurally reliable during long production campaigns, reducing the risk of deformation and unplanned shutdowns.
Fused zirconia corundum brick also demonstrates superior resistance to thermal shock compared with traditional dense alumina refractories. The fused microstructure minimizes internal stress concentration during rapid heating and cooling cycles, which is particularly important in glass furnaces and high-temperature industrial kilns where temperature fluctuations are frequent. This stability reduces spalling and cracking, extending lining life and lowering maintenance frequency.
In glass manufacturing, fused zirconia corundum brick is widely used in critical areas such as tank walls, breast walls, throats, working ends, and feeder channels. Its high purity and low contamination risk help maintain glass quality by preventing defects such as stones, cords, and inclusions. For special glass production, including display glass and optical glass, fused zirconia corundum brick is often selected for its chemical inertness and long-term performance consistency.
Beyond the glass industry, fused zirconia corundum brick is applied in high-temperature furnaces for non-ferrous metallurgy, chemical processing, and advanced ceramics production. In environments where molten materials, corrosive gases, and mechanical stress coexist, this refractory provides reliable protection for furnace linings and structural components.
Installation quality plays an important role in the performance of fused zirconia corundum brick. Precise machining, tight joint control, and compatible refractory mortars are required to fully utilize its dense structure. Proper drying and heating procedures further ensure stable operation during initial furnace start-up.
As industrial processes continue to move toward higher temperatures, longer campaigns, and stricter quality standards, fused zirconia corundum brick remains a key material for demanding refractory applications. Its combination of thermal stability, corrosion resistance, and structural reliability makes it an essential solution for industries operating at the limits of heat and chemistry.
