Silicon nitride nozzles and covers have the characteristics of anti-oxidation, high high-temperature strength, and low sputter adhesion, which can extend the service life of welding parts.
Silicon nitride Performance
Item | Unit | Si3N4 |
Type | – | Gas pressure sintered |
Density | g/cm3 | 3.2-3.3 |
Color | – | Black, Grey |
Young Modulus | GPa | 300~320 |
Vickers Hardness | GPa | 15 – 17 |
Compressive Strength | MPa | 2200 |
Bending Strength | MPa | 600-1000 |
Thermal Conductivity | W/m.K | 20-30 |
Thermal Expansion | 10-6/°C | 3.2 |
Max. Working Temp. | °C | 1200 |
Volume Resistivity | Ω ·cm | > 1014 |
Dielectric Constant | – | 6 |
Dielectric Strength | kV/mm | 12 |
Fracture toughness | MPa·m1/2 | 5.0-7.0 |
*Tested at room temperature
*The above information is for comparison only. The exact characteristics will vary depending on the manufacturing method.
Typical properties of silicon nitride ceramics
-High strength over a wide temperature range
-High hardness
-High corrosion resistance
-Low thermal expansion and high thermal conductivity
-Good thermal shock resistance
-Non-wetting with non-ferrous metals
-Insulation
Application of the Si3N4 Nozzle and cover
-Welding industry
-Chemical Industry
Packing
Silicon nitride nozzle and covers use appropriate outer boxes and internal buffer materials, and some components are also vacuum-packed.