AL9687 Castable Refractory (Al2O3-SiO2)

Castable Refractory (Al2O3-SiO2) Description

Castable Refractory (Al2O3-SiO2) is a refractory material in powdered form that, when combined with binders, can be cast into complex shapes for high-temperature applications. The defined ratio of alumina to silica promotes the formation of stable crystalline phases during sintering. This balance minimises thermal expansion and chemical interactions under extreme conditions, serving critical functions in furnace linings, burner components, and other industrial systems where high thermal stability is required.

Castable Refractory (Al2O3-SiO2) Applications

Industrial Processing
- Used as a refractory lining in high-temperature furnaces to achieve thermal insulation by leveraging its controlled ceramic composition. This application minimises heat loss and enhances operational efficiency.
- Applied as a structural component in burner assemblies to maintain dimensional integrity under rapid temperature changes by utilising its chemical inertness and thermal shock resistance.

Castable Refractory (Al2O3-SiO2) Packing

The material is packaged in moisture-resistant, sealed bags that are placed inside sturdy cardboard boxes with anti-static cushioning. This packaging minimises contamination and protects the powder from humidity fluctuations during transit and storage. The product should be stored in a cool, dry environment away from direct sunlight. Custom packaging options are available to accommodate specific transport and storage requirements.

Frequently Asked Questions

Q1: What are the recommended firing temperatures for castable refractory ceramics?
A1: The powder generally undergoes firing within a range of 1 200°C to 1 600°C. This controlled heat treatment facilitates the development of stable crystalline phases, which improves both thermal shock resistance and chemical durability. Specific firing profiles can be adjusted based on application demands.

Q2: How does the Al2O3 to SiO2 ratio impact its performance?
A2: The defined ratio is critical in forming phases such as mullite during sintering. This balance controls volumetric changes and enhances the material’s resistance to chemical attack and thermal cycling, thereby ensuring consistent behaviour in high-temperature environments.

Q3: What storage conditions are advisable for this refractory powder?
A3: The product should be stored in a sealed, dry environment to prevent moisture uptake. Maintaining stable temperature conditions and avoiding contamination are essential to preserve the powder’s handling properties and performance before use.

Additional Information

Refractory ceramics are fundamental in applications that demand high thermal and chemical stability. Their ability to maintain structure and resist degradation under extreme temperatures makes them indispensable for industrial furnaces, reactors, and kiln linings. The controlled synthesis and sintering processes used in creating these materials significantly influence their mechanical and chemical behaviour.

Understanding the material science behind alumina-silica refractories is essential for optimising their performance in various industrial systems. Detailed characterisation of phase formations and thermal expansion properties contributes to improved design of high-temperature components, ensuring efficient operation and prolonged service life in challenging environments.