Alumina Foam Ceramic Filters: The Economical Choice for Molten Metal Filtration
Alumina foam ceramic filters offer an optimal balance of performance and cost-effectiveness for general-purpose metal filtration. With excellent chemical stability and adequate temperature resistance, they are widely used in aluminum, bronze, and lower-temperature iron applications.
Product Highlights
Key Advantages
- Cost-Effective Performance: Optimal price-to-performance ratio
- Chemical Stability: Excellent resistance to oxidation and basic slags
- Thermal Consistency: Stable performance up to 1200°C
- Rapid Filtration: High open porosity enables efficient flow rates
- Easy Installation: Standard sizes fit most existing gating systems
Technical Specifications
| Parameter |
Specification |
Note |
| Material Composition |
≥85% Al₂O₃ |
High-purity alumina base |
| Color |
White |
Easy visual inspection |
| Operating Temperature |
≤1200°C |
Ideal for Al, Cu alloys |
| Porosity |
80-90% |
Ensures optimal metal flow |
| Density |
0.35-0.55 g/cm³ |
Lightweight structure |
| Compressive Strength |
≥0.8 MPa |
Sufficient for most applications |
| Available PPI |
10, 20, 30 |
Standard pore densities |
| Thermal Shock Resistance |
Good |
Suitable for most foundry conditions |
Primary Applications
Recommended Industries
- Aluminum Casting: Engine components, structural parts
- Bronze & Brass: Valves, fittings, artistic castings
- Gray Iron: Machine bases, pipes, automotive parts
- Investment Casting: Precision components
Performance Benefits
- Inclusion Removal: Effective for oxide films and small particles
- Turbulence Reduction: Creates smoother metal flow
- Improved Yield: Reduces scrap by 15-25%
- Better Machinability: Cleaner metal extends tool life
Selection Guide
Choosing the Right PPI
- 10 PPI: For high flow rates, chunky inclusions
- 20 PPI: Balanced performance, most common choice
- 30 PPI: For maximum filtration of fine particles
Standard Sizes Available
- Round: 40×13mm, 40×15mm, 50×20mm
- Square: 40×40×13mm, 50×50×15mm
- Large Formats: 7×7×2", 9×9×2", 12×12×2"
- Custom Sizes: Available with MOQ
Frequently Asked Questions
Q: What metals are alumina filters best suited for?
A: Primarily aluminum alloys (up to 800°C), bronze, brass, and lower-temperature iron applications.
Q: How do I determine the correct PPI for my application?
A: Consider your metal type and inclusion size. Contact our technical team for personalized recommendations.
Q: Can alumina filters be used for steel casting?
A: Not recommended for most steel applications due to temperature limitations and potential chemical reactions.
Q: What's the typical service life?
A: Single-use for most applications, but some low-temperature processes may allow limited reuse.
Ready to improve your casting quality? Contact our filtration specialists for samples and technical consultation.
