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Silicon Carbide Seal Ring, SiC Seal Ring

Silicon Carbide Seal Ring, SiC Seal Ring

Silicon Carbide (SiC) Seal Ring is a high-performance mechanical component that is commonly used in various industries to seal liquids and gases in pumps, compressors, and other machinery. SiC Seal Rings are made of silicon carbide material, which is a high-strength ceramic material that offers excellent hardness, wear resistance, and thermal shock resistance.

SiC Seal Rings have a number of benefits over traditional seal materials like carbon or ceramic, including their ability to withstand extreme temperatures and pressures, their resistance to corrosion and abrasion, and their low friction coefficient, which reduces energy consumption and extends the life of the equipment.

SiC Seal Rings are available in a variety of shapes and sizes to fit different types of machinery, and they can be customized to meet specific application requirements. They are commonly used in applications where high-performance seals are required, such as chemical processing, oil and gas production, power generation, and semiconductor manufacturing.

Overall, SiC Seal Rings are an excellent choice for applications that require high-performance, long-lasting seals that can withstand extreme conditions and provide reliable operation.


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 Seal Ring Specifications

CG Material supplies silicon carbide seal rings with different materials to fulfill various requirements of our customers. We provide flat silicon carbide rings, single and double stepped silicon carbide rings, and custom manufactured silicon carbide rings with complex shapes.




Sintered Silicon Carbide (S-SiC)

Basic pure SiC

Purity of SiC > 98%

Hv: 26 GPa

Graphite impregnated

15%~20% content of Graphite


Better friction resistance

Reaction Bonded Silicon Carbide (RB-SiC)

Basic SiC

Purity of SiC > 88%

Graphite impregnated

20%~30% content of Graphite


Silicon Carbide Seal Ring Applications

-Semiconductor and coating.
-Continuous-flow reactors, heat exchangers, etc.
-Mechanical seals, bearings, thrust bearings, etc.
-Mirrors for industrial laser systems.



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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