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Silicon Carbide Foam Filters

Silicon Carbide Foam Filters

Silicon Carbide (SiC) foam filters are porous ceramic filters used in the metal casting industry to remove impurities and solidify molten metals. These foam filters are made of a high-strength ceramic material that offers excellent thermal stability, mechanical strength, and chemical resistance.

SiC foam filters are designed to remove impurities and inclusions from the molten metal during the casting process, resulting in a high-quality final product with improved mechanical properties. The foam structure of these filters allows for the uniform flow of the molten metal while trapping impurities, ensuring a clean and defect-free casting.

One of the primary advantages of SiC foam filters is their high-temperature stability, which allows them to withstand temperatures up to 1600°C. This makes them ideal for use in high-temperature casting processes such as those used in the aerospace and automotive industries.

Another advantage of SiC foam filters is their high mechanical strength and durability, which allows them to withstand the stresses and pressures of the casting process without degrading or collapsing. They are also chemically resistant to many corrosive metals, making them a popular choice for use in the production of stainless steel and other alloys.

SiC foam filters are available in a variety of sizes and shapes to fit different types of casting equipment and can be customized to meet specific application requirements. They are easy to install and remove, making them a popular choice for foundries looking to improve their casting quality and efficiency.

Overall, Silicon Carbide (SiC) foam filters are a reliable and effective solution for removing impurities and improving the quality of molten metals in the casting process. Their high-temperature stability, mechanical strength, and chemical resistance make them an ideal choice for use in a wide range of casting applications.


Silicon Carbide Ceramics Properties

Compound Formula SiC
Molecular Weight 40.1
Appearance Black
Melting Point 2,730° C (4,946° F) (decomposes)
Density 3.0 to 3.2 g/cm3
Electrical Resistivity 1 to 4 10x Ω-m
Poisson's Ratio 0.15 to 0.21
Specific Heat 670 to 1180 J/kg-K

Silicon Carbide Ceramics Specification

CAS#: 409-21-2, Not Hazardous
Powder, F.W. 40.10, m.p. 2700 °C, Spec. Gravity 3.217 gm/cm3
Item No. Description Purity Lot Size
CB14-85 Silicon Carbide Powder
Particle Size:18, 30, 40 or 200 mesh
> 85 %
F.C. < 2.5%, Fe2O3 < 2%, Al2O3 < 1.2%
CB14-90 Silicon Carbide Powder
Particle Size:18, 30, 40 or 200 mesh
> 90 %
F.C. < 1.5%, Fe2O3 < 1.2%
CB14-98 Silicon Carbide Powder
Particle Size:18, 30, 40 or 200 mesh
> 98 %
F.C. < 0.6%, Fe2O3 < 0.7%

Silicon Carbide Ceramics Applications

Until the invention of boron carbide in 1929, silicon carbide was the hardest synthetic material known. It has a Mohs hardness rating of 9, approaching that of a diamond. In addition, SiC crystal has fracture characteristics that make them extremely useful in grinding wheels and in abrasive paper and cloth products.

Its high thermal conductivity, together with its high-temperature strength, low thermal expansion, and resistance to chemical reaction and thermal shock, makes silicon carbide valuable in the manufacture of high-temperature bricks and other refractories.

SiC ceramic is also classed as a semiconductor, having an electrical conductivity between that of metals and insulating materials. This property, in combination with its thermal properties, makes SiC a promising substitute for traditional semiconductors such as silicon in high-temperature applications.

Silicon Carbide Foam Filters Specifications 

Working Temperature ≤1540°C
Porosity 80~90%
Compression Strength
(Room Temperature)
Volume Density 0.3-0.5 g/cm3
Thermal Shock Resistance 1200°C—room temperature 3 times

Chemical Composition











Silicon Carbide Foam Filters Applications

– Cast iron, cast copper, cast bronze, cast brass
– High temperature gas filter,
– Chemical fillings and catalysis carrier etc.


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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