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Magnesium Oxide Foam Filter
Porosity: 80%-90%
Cell Size: 8–40 PPI
Magnesium Oxide Foam Filter offers a dependable solution for filtering molten magnesium alloys during casting. Its open-cell structure, formed through high-temperature sintering of magnesia-coated foam, ensures efficient removal of impurities and trapped gas. This leads to smoother metal flow, fewer casting flaws, and improved part consistency. Its strong chemical stability makes it suitable for use in demanding foundry environments. We can supply high-quality magnesium oxide foam filters with various specifications and competitive prices, offering customized solutions to meet specific requirements.
Or email us at sales@heegermaterials.com.Magnesium Oxide Foam Filter Data Sheet
| Color: | Dark yellow |
| Chemical Formula: | MgO |
| Density: | 3.20 g/cm3 |
| Dimension: | customized |
| Shape: | Round, square or customized |
| Pore Density (PPI): | 8–40 |
| Porosity (%): | 80–90 |
| Refractoriness (°C): | 1100 |
| Bending Strength (MPa): | 0.6 |
| Compression Strength (MPa): | 0.8 |
| Thermal Shock Resistance: | 6 times (1100°C to room temperature) |
| Applicable Alloys: | Nickel and high-activity alloys |
Magnesium Oxide Foam Filter Description
Magnesium oxide foam filter is a specialized filtration material designed for magnesium alloy casting. It is made by applying a magnesia-based slurry onto a polyurethane sponge and sintering it to form a rigid, porous ceramic structure. This filter effectively removes inclusions and traps gas during metal flow, enhancing casting purity and surface quality. Its excellent chemical compatibility with molten magnesium helps reduce reaction and contamination, making it a reliable choice for improving casting yield and reducing defects.
Magnesium Oxide Foam Filter Features
- Excellent filtration efficiency for magnesium alloys
- High porosity with uniform cell structure
- Chemically stable with molten magnesium
- Low thermal mass for fast heat transfer
- Lightweight and easy to handle during installation
Magnesium Oxide Foam Filter Applications
- Magnesium Alloy Purification: Effectively filters out inclusions and oxides, enhancing the structural uniformity of magnesium castings.
- Lightweight Automotive Components: Used in casting precision parts like transmission cases and steering brackets, improving material performance and weight reduction.
- High-Performance Aerospace Castings: Ensures cleaner melts and fewer casting defects in critical aerospace magnesium alloy parts.
- Consumer Electronics Casting: Applied in the molding of compact magnesium alloy shells for phones, laptops, and handheld devices.
- Eco-Friendly Foundry Operations: Supports energy-efficient casting lines that prioritize low emissions and reduced material waste.
Magnesium Oxide Ceramic Machining
Magnesium oxide can be machined in green or bisque form before sintering, and to a limited extent in its fully sintered state. In its pre-sintered state, the material is relatively soft and easier to shape, but like many ceramics, it undergoes significant shrinkage—up to 20%—during sintering, which can affect final dimensions. Fully sintered magnesium oxide is very hard and brittle, requiring diamond tools and precision equipment for any post-sintering machining.
Machining Methods and Considerations
- Green or Bisque Machining: Easier to cut and form, suitable for complex shapes before firing.
- Sintering Shrinkage: Expect about 15–20% dimensional reduction during sintering, which impacts tolerance control.
- Post-Sintering Machining: Requires diamond grinding tools due to the material’s hardness and brittleness.
- Fragility: Fully sintered MgO is prone to chipping and fracture if not handled with care during machining.
- Tooling and Time: Machining dense MgO ceramics is time-consuming and requires specialized equipment.
Magnesium Oxide Ceramic Packaging
Magnesium oxide ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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