Sintered zirconia-corundum bricks, relying on a composite structure of corundum and zirconia, possess excellent comprehensive performance.
Their core performance advantages are concentrated in five aspects:
1. High Temperature Resistance and Stability
High refractoriness, with long-term service temperatures exceeding 1700℃, low reheat shrinkage, and low high-temperature creep. They are not easily deformed or loosened under long-term high-temperature and load conditions, ensuring stable masonry structures and meeting the production needs of continuous high-temperature kilns.
2. High Mechanical Strength and Erosion/Abrasion Resistance
The brick’s dense and uniform structure provides excellent mechanical properties at both room and high temperatures, with high compressive strength and hardness. It effectively resists erosion from furnace materials, flue gas abrasion, and mechanical impact, exhibiting strong wear resistance, significantly reducing the probability of furnace lining damage and extending equipment service life.
3. Excellent Thermal Shock Resistance
This is one of its core advantages. Zirconia’s phase transformation toughening effect effectively buffers and releases temperature stress caused by temperature differences, making it less prone to cracking, spalling, and chipping under conditions of kiln start-up and shutdown or sudden temperature changes. It is suitable for production environments with frequent temperature fluctuations and exhibits outstanding fatigue resistance.
4. Strong Resistance to Erosion and Penetration
It possesses excellent chemical stability and strong inertness at high temperatures, making it resistant to reactions with acidic and alkaline media. Sintered zirconia-corundum brick effectively resists corrosion and penetration from molten glass and alkaline slag, preventing molten material from seeping into the brick structure and causing structural damage. It is suitable for various high-temperature corrosive conditions.
5. Strong Comprehensive Applicability and High Cost-Effectiveness
The product boasts balanced and stable performance, considering high-temperature performance, mechanical properties, and resistance to temperature changes and corrosion. It is suitable for various harsh high-temperature environments such as glass kilns and metallurgical industrial furnaces. Compared to traditional refractory materials, it has a longer service life and lower overall cost.
