Silicon Nitride Rods
We provide silicon nitride welding rod, pin and regularly used rods.
Silicon Nitride Rods, Si3N Rod
Silicon nitride ceramic is an inorganic material ceramic that does not shrink during sintering. There are five different methods to produce Silicon Nitride including SRBSN, GPSN, HPSN, HIP-SN and RBSN, make the application and working material different slightly. In these 5 methods of production, GPSN is most commonly used to produce Si3N4 components. The strength of silicon nitride, especially hot-pressed silicon nitride, is one of the hardest substances in the world. Si3N4 Rod is a covalent bond compound with high strength, low density, and high temperature resistance.
The silicon nitride nozzles and covers have the characteristics of oxidation resistance, high temperature strength and less sputter adhesion, which can prolong the service life of the welding parts. We provide silicon nitride welding rod, pin and regularly used rods.
Silicon Nitride Rod, Welding Pin Description
| Size | 1-20mm diameter |
| Color | Black |
| Density | 3.21 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 Rod & Welding Pins
As a ceramic material, silicon nitride is quite fragile in a lot of cases. Our silicon nitride rod & welding pins 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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