Silicon Nitride Sleeves
Silicon Nitride Ceramic Component
SKU: FWM/SN-SLEEVE-001
- Material
- Silicon Nitride (Si₃N₄) – High-density / Gas Pressure Sintered
- Size
- Custom sizes available
- MOQ
- 5 pieces per type
- Applications
- Pumps & Compressors
Silicon Nitride Sleeves (also known as Si₃N₄ bushings or shaft sleeves) are high-performance precision ceramic components designed for extreme wear, corrosion, high-temperature and high-speed environments.
Send drawing, dimensions, tolerances, surface finish requirements and quantity for feasibility review and quotation.
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Product Description
Review representative product forms and application context below. Final geometry and acceptance criteria are confirmed from the drawing and operating conditions.
Silicon Nitride Sleeves (also known as Si₃N₄ bushings or shaft sleeves) are high-performance precision ceramic components designed for extreme wear, corrosion, high-temperature and high-speed environments.
Manufactured from high-density silicon nitride ceramics, these sleeves offer exceptional mechanical strength, outstanding thermal shock resistance, superior wear resistance and excellent dimensional stability. They are widely used as protective sleeves, bearing sleeves and insulating components in pumps, high-speed machinery, high-temperature equipment and precision rotating systems where traditional metal or other ceramic sleeves cannot meet performance requirements.
Manufacturing process (source record): High-purity Si₃N₄ powder + sintering additives → forming → high-temperature / gas pressure sintering → precision grinding and polishing → final inspection.
Quality control (source record): Dimensional inspection (including inner/outer diameter, roundness, cylindricity), surface quality check, material property verification and batch traceability.
Data status: the source record is not supplier-verified. Numerical values are typical engineering references, not guaranteed product specifications; final values require grade, drawing and test-basis confirmation.
Product Features
- High hardness and superior wear resistance
- Excellent thermal shock resistance and high-temperature stability
- High flexural strength and fracture toughness
- Good corrosion resistance to acids, alkalis and many chemicals
- Electrical insulation and non-magnetic properties
- Precision machinable to tight tolerances and fine surface finishes
- Low density for reduced inertia
Typical Applications
- Shaft sleeves and bushings in pumps and rotating equipment
- High-temperature protective sleeves
- Bearing sleeves and insulating components
- Precision machinery and high-speed spindles
- Semiconductor, aerospace and industrial high-wear systems
Technical Data
| Property | Unit | Typical Value |
|---|---|---|
| Density | g/cm³ | 3.15 – 3.26 |
| Apparent porosity | % | 0 – 0.2 |
| Young’s Modulus | GPa | 300 – 320 |
| Flexural / Bending Strength | MPa | ≥ 700 – 900 |
| Fracture Toughness | MPa·m¹/² | 6 – 9 |
| Vickers Hardness / HRA | GPa / HRA | 15 – 16 GPa / 92 – 94 |
| Thermal Expansion Coefficient | ×10⁻⁶/°C | 2.95 – 3.3 |
| Thermal Conductivity | W/(m·K) | 20 – 27 |
| Max. Operating Temperature (air) | °C | 1200 – 1400 |
| Dielectric Strength | kV/mm | > 15 |
| Electrical Resistivity | Ω·cm | > 10¹⁴ |
Typical reference values for material selection only. Final specifications are confirmed against drawing, grade and operating conditions. Values are typical reference data and may vary with grade, geometry and test method. Final specifications confirmed against drawing and operating conditions.
Available Forms
Representative forms are shown for selection. Send drawing, dimensions, tolerances, surface finish requirements and quantity for feasibility review and quotation.
- Straight sleeves, flanged sleeves, stepped sleeves
- Custom inner/outer diameter, length and wall thickness
- Precision ground and polished surfaces
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 and quantity. Terms confirmed in the quotation. |
About FreeWill Material
FreeWill Material supplies technical ceramic components for demanding industrial applications. Our product range includes silicon carbide, silicon nitride, alumina, zirconia and other engineered ceramic materials.
We work with qualified manufacturing resources in China to support material selection, drawing-based customization, production coordination, inspection documentation and export delivery. Component feasibility, tolerances and material grades are reviewed according to the customer's drawings and operating conditions.
Our focus is to provide international buyers with clear technical communication, practical sourcing support and responsive quotation service for custom ceramic components.
- Drawing-Based Customization
- Material Selection Support
- Inspection Documentation
- Export Coordination