Silicon Nitride Degassing Rotors
Silicon Nitride Ceramic Component
SKU: FWM/SN-DGR-001
- Material
- Silicon Nitride (Si₃N₄) – Gas Pressure Sintered (GPS)
- Size
- Custom sizes available
- MOQ
- 5 pieces per type
- Applications
- Aluminum Casting & Foundry
Silicon Nitride Degassing Rotors are core purification components used in aluminum melting and casting processes.
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Product Description
Silicon nitride degassing rotors disperse treatment gas into molten aluminum to help remove dissolved hydrogen before casting.
The rotating head breaks the gas stream into bubbles and distributes them through the melt. Dissolved hydrogen diffuses into the bubbles and is carried toward the surface; rotor geometry and gas delivery control how the treatment works.
Silicon nitride's thermal shock resistance, mechanical strength and resistance to molten-aluminum attack make it useful for the immersed rotor and shaft. Low wetting by aluminum helps limit metal buildup.
Product Features
- Low wetting by molten aluminum to help limit metal buildup
- Resistance to corrosion and erosion in compatible aluminum melts
- Mechanical strength for the immersed rotor and shaft
- Thermal shock resistance for temperature changes
- Rotor and gas-path geometry matched to the treatment system
Typical Applications
- Rotary degassing systems for molten aluminum
- Aluminum-alloy melting and holding operations
- Melt treatment ahead of casting
- Online aluminum treatment systems
95% Si₃N₄ Typical Properties
| Property | 95% Si₃N₄ | Condition / method |
|---|---|---|
| Density (g/cm³) | ≥3.2 | — |
| Young’s modulus (GPa) | 300 | — |
| Fracture toughness (MPa·m½) | 6.2 | — |
| Flexural strength (MPa) | >720 | 25°C |
| Compressive strength (MPa) | 2200 | 25°C |
| Thermal conductivity (W/(m·K)) | 15–20 | 25°C |
| Coefficient of thermal expansion (10⁻⁶/K) | 3.0–3.2 | 25–1000°C |
| Volume resistivity (Ω·cm) | >10¹⁴ | 25°C |
| Typical maximum material temperature (°C) | 1200 | — |
| Poisson’s ratio | 0.26 | — |
| Dielectric strength (kV/mm) | 16 | — |
| Relative permittivity | 8.2 | 1 MHz; 25°C |
| Dielectric loss tangent | 0.004 | 1 GHz; 25°C |
Available Forms
Representative forms are shown for selection. Send drawing, dimensions, rotating speed, operating temperature and quantity for confirmation before quotation.
- Complete rotor assemblies (rotor head + shaft)
- Custom blade designs and shaft lengths
- Designs optimized for different degassing systems
Packaging & Shipping
Packing and shipment arrangements are selected for the confirmed component geometry and order requirements.
| Item | Details |
|---|---|
| Packaging & shipping | Individually protected, cushioned and packed in export cartons or wooden cases according to size, quantity and transport requirements. Port of shipment confirmed in the quotation. |
| Payment terms | T/T / Western Union / PayPal; 50% advance payment, 50% balance before shipment |
| Shipping methods | Sea freight / Air freight / Door-to-door courier |
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