What Is a Microporous Silicon Carbide Ceramic Foam Filter?
A microporous silicon carbide ceramic foam filter is an open-cell SiC filtration component used to capture inclusions, dust particles or solid impurities while allowing molten metal, hot gas or process media to pass through controlled pore channels. Compared with dense ceramic parts, the foam structure provides a balance of filtration area, flow resistance and thermal shock tolerance.
For industrial buyers, the key selection factors are not only material type, but also PPI, thickness, pore uniformity, flow direction, operating temperature, chemical exposure and installation geometry. ADCERAX supports these factors through engineering review before quotation.
Why Silicon Carbide Foam Filters Are Used in Harsh Filtration Systems
Silicon carbide foam filters are selected when filtration media must remain stable under heat, corrosion and particle loading. The SiC matrix provides a strong thermal and chemical foundation, while the open-cell pore network supports controlled flow through the filter body.
High-temperature stability helps the filter maintain shape during metal pouring, furnace exhaust treatment and thermal cycling. The interconnected pore channels support impurity capture without creating excessive flow restriction when the correct PPI and thickness are selected. Chemical resistance also makes SiC suitable for selected acidic, alkaline or solvent-rich gas-solid environments where metallic filters may corrode or deform.
Technical Specifications of Microporous Silicon Carbide Ceramic Foam Filter
ADCERAX® Microporous Silicon Carbide Ceramic Foam Filter is defined by measurable thermal stability, mechanical strength, and chemical endurance, providing a reliable filtration structure suitable for demanding metallurgical, thermal‑processing, and gas‑solid separation environments.
| Parameter | Current / Suggested Value | What It Means for Filter Selection |
|---|---|---|
| Material Composition | High-purity Silicon Carbide, SiC | Determines heat resistance, corrosion behavior and mechanical stability. |
| PPI Range | 10–60 PPI | Lower PPI supports higher flow; higher PPI supports finer impurity retention. |
| Pore Uniformity | ≥90% consistency | Helps maintain predictable filtration and reduces uneven flow paths. |
| Density | 0.25–0.60 g/cm³ | Influences mechanical strength, pressure drop and handling stability. |
| Flexural Strength | 0.8–1.8 MPa | Indicates resistance to bending stress during handling and installation. |
| Compressive Strength | 1.0–4.5 MPa | Supports structural stability under fluid, gas or melt flow pressure. |
| Working Temperature | 1500–1700°C | Helps determine whether the filter matches casting or furnace conditions. |
| Thermal Expansion | 4.0–5.5 × 10⁻⁶ K⁻¹ | Lower expansion helps reduce cracking risk during rapid temperature changes. |
| Thermal Shock Resistance | 1350°C ± 500°C | Supports use in systems with repeated heating and cooling cycles. |
| Chemical Resistance | Stable in strong acids and alkalis | Useful for corrosive gas-solid filtration and selected chemical processing lines. |
| Molten Metal Compatibility | Al, Fe, Cu, Mg | Helps buyers judge whether the filter suits their alloy or melt system. |
| Heat Conduction | Medium to high thermal conductivity | Supports faster thermal balance and reduces localized thermal stress. |
Microporous Silicon Carbide Ceramic Foam Filter Standard Sizes
ADCERAX supplies round and square microporous SiC foam filters for different installation cavities, casting layouts and filtration modules. Standard sizes are listed below for reference, but final selection should consider filter diameter, thickness, pore size, flow direction, operating temperature and expected impurity loading.
Type 1 -Round Microporous SiC Ceramic Foam Filter
| Item | Diameter*Thickness (mm) | Pore Size (μm) |
| AT-SIC-PM025 | 5.5*3 | 0.1 |
| AT-SIC-PM026 | 15*3 | 25 |
| AT-SIC-PM027 | 15*3 | 0.2 |
| AT-SIC-PM028 | 16*3.5 | 1 |
| AT-SIC-PM029 | 20*2 | 2 |
| AT-SIC-PM030 | 20.5*4 | 0.8 |
| AT-SIC-PM031 | 21*3.1 | 0.2 |
| AT-SIC-PM032 | 21*3.1 | 0.1 |
| AT-SIC-PM033 | 21*3.1 | 1 |
| AT-SIC-PM034 | 26.2*3 | 1 |
| AT-SIC-PM035 | 28.5*3 | 0.8 |
| AT-SIC-PM036 | 28.5*3 | 1 |
| AT-SIC-PM037 | 28*3 | 10 |
| AT-SIC-PM038 | 28*4 | 1 |
| AT-SIC-PM039 | 28.5*5 | 1 |
| AT-SIC-PM040 | 29*2 | 0.8 |
| AT-SIC-PM041 | 29*3 | 0.5 |
| AT-SIC-PM042 | 29*6 | 0.2 |
| AT-SIC-PM043 | 31.5*3.5 | 0.2 |
| AT-SIC-PM044 | 31.5*4.5 | 1 |
| AT-SIC-PM045 | 38.5*3 | 1 |
| AT-SIC-PM046 | 47*5 | 30 |
| AT-SIC-PM047 | 47.5*3 | 0.2 |
| AT-SIC-PM048 | 47.7*2.5 | 0.2 |
| AT-SIC-PM049 | 47.7*3.5 | 0.2 |
| AT-SIC-PM050 | 47.5*4 | 30 |
| AT-SIC-PM051 | 47.7*4.5 | 50 |
| AT-SIC-PM052 | 48.5*3 | 0.2 |
| AT-SIC-PM053 | 48.5*5 | 0.2 |
| AT-SIC-PM054 | 49.5*4.5 | 30 |
| AT-SIC-PM055 | 49.5*4.5 | 50 |
| AT-SIC-PM056 | 50*2 | 0.2 |
| AT-SIC-PM057 | 50*5 | 3 |
| AT-SIC-PM058 | 50*10 | 3 |
| AT-SIC-PM059 | 61.8*5 | 5 |
| AT-SIC-PM060 | 61.8*10 | 5 |
| AT-SIC-PM061 | 70*5 | 8 |
| AT-SIC-PM062 | 70*10 | 8 |
| AT-SIC-PM063 | 79.8*10 | 10 |
| AT-SIC-PM064 | 83*10 | 13 |
| AT-SIC-PM065 | 100*5 | 15 |
| AT-SIC-PM066 | 100*10 | 30 |
Type 2 -Square Microporous SiC Ceramic Foam Filter
| Item | Length*Width*Thickness (mm) | Pore Size (μm) |
| AT-SIC-PM067 | 60*60*6 | 3 |
| AT-SIC-PM068 | 100*100*8 | 10 |
| AT-SIC-PM069 | 100*100*10 | 13 |
| AT-SIC-PM070 | 150*150*10 | 15 |
How to Select PPI, Thickness and Shape for SiC Foam Filters
| Selection Factor | Recommended Buyer Check | Engineering Meaning |
|---|---|---|
| PPI | Confirm whether the priority is higher flow or finer retention. | Lower PPI reduces flow resistance; higher PPI improves finer impurity capture. |
| Filter Thickness | Match thickness to pressure drop and installation depth. | Thicker filters may improve retention but can increase resistance. |
| Shape | Choose round or square based on housing or gating design. | Proper fit reduces bypass and edge leakage. |
| Operating Temperature | Provide normal and peak temperature ranges. | Helps confirm thermal shock and material suitability. |
| Media Type | Specify molten metal, exhaust gas or chemical gas stream. | Different media require different pore and material stability checks. |
| Impurity Type | Provide expected particle type and approximate size. | Helps select pore density and filtration path. |
| Installation Method | Provide support frame, edge contact and flow direction. | Prevents cracking, misalignment and bypass flow. |
Packaging for Microporous SiC Foam Filters
Microporous SiC foam filters are packed with surface protection, internal cushioning and reinforced outer packaging to reduce vibration, edge damage and pore contamination during transport. For small or precision filters, individual wrapping and separation layers are recommended.
