1. Technical parameters of zirconia refractory brick
|
Item |
Y2O3-stabilized product |
CaO-stabilized product |
|
|
Color |
White |
White |
|
|
ZrO2+HfO2, % |
≥83 |
≥91 |
|
|
Y2O3, % |
16-17 |
8-9 |
|
|
CaO, % |
3.8-4.2 |
||
|
Fe2O3, % |
≤0.2 |
≤0.2 |
|
|
SiO2, % |
≤0.1 |
≤0.1 |
|
|
Density, g/cm3 |
≥4.5 |
≥4.5 |
|
|
Maximum operating temperature, ℃ |
2200 |
2200 |
|
|
Thermal conductivity, 1000℃, W/m.K |
2.09 |
2.09 |
|
|
Cold Crushing Strength, 1000℃, MPa |
≥1200 |
≥1200 |
|
|
Hardness |
≥7 |
≥7 |
|
2. Product Description of zirconia refractory brick
The zirconia refractory brick is divided into two types: Y₂O₃-stabilized and CaO-stabilized. It is sintered at 1800°C after mixing high-purity raw materials and high-pressure forming. The brick exhibits excellent chemical stability, low volatility, superior thermal shock resistance, and resistance to acid and alkali corrosion. Even when heated to 1900°C, it does not react with molten metals such as aluminum, iron, nickel, and platinum, nor with silicates and acidic slags. It is widely used as lining material in intermediate-frequency high-temperature furnaces, molybdenum wire furnaces, tungsten rod furnaces, carbon black reaction furnaces, and other applications.
The maximum service temperature of zirconia brick reaches 2200°C. It features a high refractoriness-under-load temperature, low creep rate at high temperatures, strong resistance to corrosive melts, and high chemical inertness to glass melts, enabling long-term resistance to erosion. With low thermal conductivity (only 2.09 W/m·K at 1000°C), it reduces thermal stress caused by rapid temperature changes. It also offers high strength and good wear resistance.
3. Main Features of zirconia refractory brick
(1)Excellent resistance to acid and alkali corrosion, maintaining high chemical stability even when heated to 1900°C.
(2)High service temperature, up to 2200°C.
(3)High strength, high hardness, and excellent wear resistance.
(4)Low thermal conductivity, reducing thermal stress and providing excellent thermal shock resistance.
4. Main Applications of zirconia refractory brick
Zirconia refractory brick is widely used as lining material in molybdenum wire furnaces, tungsten rod furnaces, glass furnaces, high-temperature intermediate-frequency furnaces, and carbon black reaction furnaces.
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