Silicon Nitride Forming Rollers Description
Si3N4 exhibits a consistent performance at high temperatures and is widely used in the metallurgical industry. It has a microstructure that provides excellent resistance to thermal cycling. Its creep resistance and oxidation resistance are quantifiable. The material has a low thermal conductivity and high wear resistance, thereby meeting the conditions of most industrial applications.
These Si3N4 forming rollers have been implemented in rolling profiling machines. They enable the production of complex, variable profiles with a high yield. When used for polymer forming, the rollers reduce metal adhesion, thereby improving product quality.
There are 5 production methods for silicon nitride, namely SRBSN, GPSN, HPSN, HIP-SN and RBSN. These methods differ slightly in their applications and working materials. Among these, GPSN is the most frequently used method for manufacturing Si3N4 components.
Specifications for Silicon Nitride Forming Rollers
GPSN
Property
|
Unit
|
|
Colour
|
|
Grey
|
Mechanical Properties
|
|
|
Density
|
g/cm3
|
3.21
|
Compressive Strength
|
MPa
|
3 000
|
Flexural Strength
|
MPa
|
800
|
Weibull Modulus (m)
|
|
15
|
Fracture Toughness KIc
|
MPa m^1/2
|
6.5
|
Elastic Modulus (E)
|
GPa
|
320
|
Poisson's Ratio
|
|
0.28
|
Vickers Hardness (HV 1)
|
GPa
|
16
|
Thermal Properties
|
Maximum Temperature
|
Inert Gas
|
°C
|
1 200
|
Air
|
°C
|
1 100
|
Thermal Conductivity
|
|
25
|
@ 20°C
|
W/mK
|
28
|
@ 1000°C
|
W/mK
|
16
|
Thermal Expansion
|
20-100°C
|
10⁻⁶/K
|
2
|
20-1000°C
|
10⁻⁶/K
|
3.5
|
Thermal Shock Parameter R1
|
K
|
600
|
Thermal Shock Parameter R2
|
W/mm
|
15
|
Electrical Properties
|
Resistivity at 20°C
|
Ωcm
|
10^12
|
Resistivity at 800°C
|
Ωcm
|
10^7
|
Dielectric Constant
|
1 MHz
|
6
|
Silicon Nitride Forming Rollers Applications
Silicon Nitride is used in the manufacture of the following products:
- High-performance ceramic tubes
- Rollers for bearings
- Ceramic cutting tools
- Cyrol bearing rollers
- Nozzles
- Sealing rings
- Tubing forming tools
- Special applications in mechanical engineering
Silicon Nitride Forming Roller Packaging
The Silicon Nitride Forming Rollers are carefully handled during storage and transport to maintain the quality of the product in its original state.