Silicon Nitride Seal Rings
The strength of silicon nitride, especially hot-pressed silicon nitride, is one of the hardest substances in the world.
Silicon Nitride Seal Rings, Si3N4 Seal Rings
Silicon nitride ceramic is an inorganic material ceramic that does not shrink during sintering. The strength of silicon nitride, especially hot-pressed silicon nitride, is one of the hardest substances in the world. Si3N4 plate & sheet is a covalent bond compound with high strength, low density, and high-temperature resistance.
Silicon Nitride Seal Rings Description
| Size | Customized/Per drawings |
| Color | Black |
| Density | 3.22 g/cm3 |
| Flexural strength | 800 MPa |
| Fracture toughness | 6.5 MPa m^1/2 |
| Thermal stress parameters | 569 K |
Data Sheet & Typical properties of silicon nitride material:
| Item | Unit | Si3N4 |
| Type | – | Gas pressure sintered |
| Density | g/cm3 | 3.22 |
| Color | – | dark grey |
| Water Absorption | % | 0 |
| Young Modulus | Gpa | 290 |
| Vickers Hardness | Gpa | 18 – 20 |
| Compressive Strength | Mpa | 2200 |
| Flexural Strength | Mpa | 650 |
| Thermal Conductivity | W/m.K | 25 |
| Thermal Shock Resistance | Δ(°C) | 450 – 650 |
| Max. Working Temp. | °C | 1200 |
| Volume Resistivity | Ω ·cm | > 10^14 |
| Dielectric Constant | – | 8.20 |
| Dielectric Strength | kV/mm | 16 |
| * Tests under room temperature environment; * The above information is offered for comparison only. Exact properties will vary depending on the manufacturing method. | ||
Typical properties of silicon nitride ceramics
-High strength over a wide temperature range
-High fracture toughness
-High hardness
-Outstanding wear resistance
-Low thermal expansion and high thermal conductivity
-Good thermal shock resistance
-Good resistance to chemical and oxidation
Based on the above properties, Silicon Nitride Ceramic is an ideal choice in a wide range of industries, such as:
-Bearing balls and rollers
-Bearing technology in automotive engineering
-Seal Rings
-Valves, turbocharger rotors for engines
-Turbine blades
-Diesel engine glow plugs
-Molten metal handling
-Thermocouple sheaths
-Welding jigs and fixtures
-Welding Rollers
-Nozzles
-Centering Pins
-Drawing Tools
-Tube Forming Tools
-High-performance Cutting Tools
-Indexable Inserts
-Tubes and Pipes
-Mechanical Engineering Special Applications
Packing of Silicon Nitride Seal Rings
As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our silicon nitride seal rings are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for Si3N4products, vacuum packing is also engaged for some of the parts.
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