Silicon Carbide Foam Filter

Silicon Carbide Foam Filter is a high-performance filtration material with excellent high-temperature resistance (up to 1500℃), chemical corrosion resistance, and high mechanical strength. It is widely used in metal casting, chemical, and environmental fields. As a leading supplier and manufacturer of premium silicon carbide products, we can supply high-quality silicon carbide foam filters with various specifications and competitive prices, offering customized solutions to meet specific requirements.

Silicon Carbide Foam Filter Data Sheet

Purity:	80%-90%
Pore Size:	7-45 PPI
Operating Temperature:	≤1500℃
Volume Density:	0.4-0.5 g/cm³
Room Temperature Bending Strength:	0.8 MPa
Room Temperature Compression Strength:	1.0 MPa
Thermal Shock Resistance:	1100℃ to room temperature, 6 times

Silicon Carbide Foam Filter Description

Silicon Carbide Foam Filter is an effective molten metal filter with a unique porous structure, effectively removing impurities and gases from molten metal and improving the casting quality. It offers excellent high-temperature resistance (up to 1500℃), chemical resistance, and high mechanical strength, making it ideal for filtering aluminum, copper, iron, etc. The common porosities are 10 PPI, 20 PPI, 30 PPI, and 40 PPI. NexusX supports customized solutions in sizes, thicknesses, and pore sizes for diverse industry and research applications.

Silicon Carbide Foam Filter Features

High Thermal Stability: Can withstand high temperatures (up to 1500℃), making them suitable for molten metal filtration.
High Strength: Offers excellent mechanical strength, ensuring durability during metal pouring.
Good Filtration Efficiency: Effectively filters out impurities, improving metal quality.
Low Pressure Drop: Ensures smooth molten metal flow while minimizing pressure loss.
Corrosion Resistance: Resistant to corrosion from molten metals, extending filter life.
Lightweight and Easy Handling: Despite their strength, they are lightweight and easy to handle.
Porosity Control: Can be manufactured with controlled porosity for specific filtration needs.

Silicon Carbide Foam Filter Applications

Metallurgy: Used in foundries to filter molten metals like iron, steel, and non-ferrous alloys, improving metal purity and casting quality.
Casting: Used to refine the quality of castings, reduce defects like porosity, and enhance surface finish.
Steel Industry: Helps in manufacturing high-quality steel by filtering molten steel before casting.
Aluminum Casting: Widely used in aluminum and its alloys to remove impurities and improve casting integrity.
Automotive Industry: Used in producing components such as engine blocks and other vehicles’ cast parts

Silicon Carbide Foam Filter Packaging

Silicon carbide foam filter 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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FAQ

What are the core structural features of Silicon Carbide Foam Filters? Why are they high-temperature stable?

Core structure: 3D interconnected porous network, porosity 70%-90%, pore size 5-50ppi (adjustable). High-temperature stability comes from SiC’s properties: melting point 2700℃, high thermal conductivity, low thermal expansion coefficient (4.5×10⁻⁶/℃), and chemical inertness. It works stably below 1600℃ without reacting with molten metals or cracking.

Key application industries & core advantages over traditional metal filters (e.g., stainless steel meshes)?

Main applications: Non-ferrous/ferrous metal casting, high-temperature molten salt filtration, new energy material synthesis. Advantages: 1. Higher efficiency (intercepts 10μm inclusions vs. 50μm for stainless steel); 2. Better high-temp resistance (withstands >1600℃ vs. <800℃ for stainless steel); 3. Longer lifespan (8-12h vs. 1-2h for stainless steel in aluminum filtration).

How to select pore size (ppi) and dimensions? Key factors?

Key factors: Metal type, casting quality, pouring flow rate. Pore size: 30-50ppi for low-viscosity/high-quality castings; 10-20ppi for high-viscosity metals/large flow rates; 20-30ppi for general aluminum castings. Dimensions: Filter area = 1.2-1.5×sprue area, flow rate 0.5-1.5m/s; thickness 25-30mm (high inclusions) or 15-20mm (low inclusions).

Causes of clogging/cracking and preventive measures?

Clogging causes: Mismatched small pores, high inclusions, low pouring temp. Prevention: Adjust pore size, refine molten metal, control temp (Al≥680℃, Cu≥1100℃). Cracking causes: Assembly gaps, high flow rate (>2m/s), filter defects. Prevention: Seal gaps, control flow rate (0.5-1.5m/s), select qualified products and conduct thermal shock tests.

Main production steps & process impacts on performance?

Steps: Organic foam pretreatment → slurry preparation → impregnation → excess slurry removal → drying → high-temp sintering → cutting. Impacts: 1. Slurry viscosity (200-500mPa·s) affects permeability/strength; 2. Sintering (1600-1700℃, 2-4h) affects bonding/porosity; 3. Cutting speed (30-40mm/min, water-cooled) avoids slag shedding/oxidation.

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