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| 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 (SiC) is a lightweight ceramic material with high strength properties comparable to diamond. It has excellent thermal conductivity, low thermal expansion, and is resistant to corrosion from acids. Silicon carbide is an excellent ceramic material for applications requiring good erosion and abrasive resistance. Consequently, it is useful in a variety of applications including spray nozzles, shot blast nozzles and cyclone components.
Silicon carbide is an ideal material for sealing rings and bearings. It has good corrosion resistance, great mechanical strength under high temperature and excellent wear resistance. We can supply ring and bearing products made by SiC as well as other SiC parts. Bearings made by other ceramic materials, such as ZrO2 and Si3N4 are also available.
| Value | |
| Inner Diameter (ID) | 4~100mm |
| Outer Diameter (OD) | ID + 5~40mm |
| Length/Thickness | 4~34mm |
| Material | SiC, ZrO2, Si3N4 |
Silicon carbide ceramic bearing maintains its high mechanical strength in temperatures as high as 1,400C It has higher chemical corrosion resistance than other ceramics.
ACM offers a complete family of fully dense silicon carbide ceramics materials. These materials have the following key characteristics:
| Density | gm/cc | 3.1 |
| Crystal Size (Average) | Microns | 12 |
| Water absorption (open porosity) | % | 0 |
| Gas permeability | % | 0 |
| Color | Black | |
| Flexural Strength (MOR) 20°C | MPa (psi x 103) | 462 (67) |
| Elastic Modulus 20°C | GPa (psi x 106) | 393 (57) |
| Poisson’s Ratio 20°C | 0.20 | |
| Compressive Strength 20°C | MPa (psi x 103) | 2700 (363) |
| Hardness | GPa (kg/mm2) | 26 (2500) |
| R45N | – | |
| Tensile Strength 25°C | MPa (psi x 103) | 307 (44.5) |
| Fracture Toughness K(I c) | mpa m1/2 | 4 |
| Thermal Conductivity 20°C | W/m K | 125 |
| Coefficient of Thermal Expansion 25-1000°C | X 10-6/°C | 4.3 |
| Specific Heat 100°C | 880 J/kg*K | 800 |
| Thermal Shock Resistance ΔTc | °C | 400 |
| Maximum Use Temperature | °C | 1000 |
| Dielectric Strength 6.35mm | ac-kV/mm (ac V/mil) | – |
| Dielectric Constant 1 MHz | 25°C | – |
| Dielectric Loss (tan delta) 1 MHz | 25°C | – |
| Volume Resistivity 25°C | ohm-cm | |
| 500°C | ohm-cm | |
| 1000°C | ohm-cm |
| Density | gm/cc | 3.15 |
| Crystal Size (Average) | Microns | 43169 |
| Water absorption (open porosity) | % | 0 |
| Gas permeability | % | 0 |
| Color | Black | |
| Flexural Strength (MOR) 20°C | MPa (psi x 103) | 480 (70) |
| Elastic Modulus 20°C | GPa (psi x 106) | 410 (59) |
| Poisson’s Ratio 20°C | 0.21 | |
| Compressive Strength 20°C | MPa (psi x 103) | 3500 (507) |
| Hardness | GPa (kg/mm2) | 26 (2800) |
| R45N | – | |
| Tensile Strength 25°C | MPa (psi x 103) | – |
| Fracture Toughness K(I c) | mpa m1/2 | 4 |
| Thermal Conductivity 20°C | W/m K | 150 |
| Coefficient of Thermal Expansion 25-1000°C | X 10-6/°C | 4.4 |
| Specific Heat 100°C | 880 J/kg*K | 800 |
| Thermal Shock Resistance ΔTc | °C | 300 |
| Maximum Use Temperature | °C | 1600 |
| Dielectric Strength 6.35mm | ac-kV/mm (ac V/mil) | – |
| Dielectric Constant 1 MHz | 25°C | – |
| Dielectric Loss (tan delta) 1 MHz | 25°C | – |
| Volume Resistivity 25°C | ohm-cm | |
| 500°C | ohm-cm | |
| 1000°C | ohm-cm |
-Silicon carbide is frequently used in semiconductor and coating industries.
-Silicon carbide (SiC) has been used as the bearing material for magnetic drive pumps for many years.
ACM’s Silicon Carbide Ball Bearing is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Submit your review | |
I used these silicon carbide bearings to replace the inferior bearings in my garden car. They seem to be well made.
