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Fused Cast Zirconia Block (RTK-Z9540) - High Purity from China Suppliers & Factory for Glass Furnaces
Brief Introduction
Fused cast zirconia blocks are high zirconia refractories made by melting high purity raw materials through special casting process. The series of molten high zirconium bricks mainly includes RTK-Z9540 (zirconium content >89%) and RTK-Z9510 (zirconium content >93%) RTK-Z9540 Mineral composition: ZrO₂(89 %), SiO₂(9%), Na₂O (0.05%).
The crystalline structure of fused cast zirconia blocks is mainly composed of baddeleyite, So it has extremely high corrosion resistance, low foaming rate characteristics, these advantages can prevent the contamination of the molten glass.
Furnace Applications:
Fused cast zirconia block can be widely used in various glass furnaces, especially high quality and special glass furnaces, such as liquid crystal substrate glass furnace, high alumina glass furnace, borosilicate glass furnace, halogen lighting glass furnace, glass ceramic furnace, glass fiber furnace etc.
Zirconia refractory products are produced with PLC programmed special electric furnace and special material incubator. During casting, the shrinkage cavity block is obtained after molding. This casting method is generally used for cast zirconia block products.
Fused cast high zirconium brick is one of our four core products, and the main physical and chemical indexes of high zirconium brick series products produced by Reftech have reached the level of international mainstream suppliers, and the quality of products can be fully guaranteed.
Chemical & Mineral Composition
| Chemical Composition and Mineral Composition | ||
|---|---|---|
| Chemical Composition (%) | ZrO₂ | 89.0 |
| SiO₂ | 9.1 | |
| Al₂O₃ | 1.5 | |
| Na₂O | 0.1 | |
| Others | 0.3 | |
| Mineral Composition (%) | Baddeleyite | 88 |
| Vitreous Phase | 12 | |
Physical Property
| Physical Property | |
|---|---|
| Normal temperature compressive strength (Mpa) | 600 |
| Bulk density (g/cm3) | 5 |
| Apparent porosity (%) | ≤1 |
| Corrosion resistance of molten glass at three-phase interface (mm/24h) | ≤0.8 |
| Exudation amount of vitreous phase | ≤0.4 |
|
Thermal conductivity W/(m·k) • At 600°C • At 1000°C |
3.0 2.8 |
|
Resistivity (Ω·m) • At 1500°C • At 1600°C |
5.0 2.4 |
|
Coefficient of thermal expansion • At 1000°C • At 1500°C |
0.65 0.10 |
Frequently Asked Questions (FAQ)
Q1
What are fused cast zirconia blocks?
Fused cast zirconia blocks are premium high-zirconia refractories produced by melting high-purity raw materials using advanced electric furnaces and dedicated casting processes.
Q2
What are the main models and compositions available?
The series primarily includes RTK-Z9540 (zirconium content >89%) and RTK-Z9510 (zirconium content >93%). RTK-Z9540 comprises 89% ZrO₂, 9.1% SiO₂, and minimal traces of Al₂O₃ and Na₂O.
Q3
Why do fused cast zirconia blocks resist glass corrosion so effectively?
Their crystalline matrix is predominantly composed of baddeleyite (88%), giving them superior corrosion resistance, extremely low apparent porosity (≤1%), and low foaming rates to prevent molten glass contamination.
Q4
Which glass furnace applications are best suited for these refractories?
They are widely applied in high-quality and specialty glass furnaces, including LCD substrate glass furnaces, high-alumina glass, borosilicate glass, halogen lighting glass, glass ceramics, and glass fiber furnaces.
Q5
How is the manufacturing quality controlled?
Production utilizes PLC-programmed electric furnaces and specialized material incubators, meeting international mainstream supplier standards with comprehensive physical and chemical performance assurance.