Silicon nitride exhaust hood has the advantages of high hardness, stable chemical properties, corrosion resistance, excellent thermal shock resistance, wear resistance, etc., and is used in reactors with drastic temperature changes and corrosive atmospheres.
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 |
Advantages
-High-temperature resistance, corrosion resistance, no pollution,
-Strong thermal shock resistance, no slag or explosion
-High mechanical strength and easy operation
-High degree of insulation
-Not affected by reducing atmosphere, anti-oxidation, stable performance
Application of the Si3N4 exhaust hoods
-Used in polysilicon reduction furnace
-Used in the photovoltaic industry. It is thermal shock resistant, anti-corrosion, and durable. It can effectively prevent silicon slag and silicon blocks from entering the exhaust pipeline.
Packing
Silicon Nitride exhaust hoods use appropriate outer boxes and internal buffer materials, and some components are also vacuum-packed.