High Strength Silicon Nitride Ceramic Plunger with Wear and Corrosion Resistance for Industrial Applications
The Silicon Nitride Ceramic Plunger is a cylindrical industrial ceramic component manufactured from high-performance silicon nitride material. This precision-engineered product offers superior performance compared to traditional metals and alumina ceramics in extreme operating conditions. Manufactured from high-purity silicon nitride powder using advanced forming and sintering processes, it features a dense microstructure with precision-ground and polished surfaces for exceptional dimensional accuracy and smoothness.
- High-Temperature Industrial Furnaces & Equipment: Kiln rollers, support rods, and fixtures in semiconductor sintering, metallurgy, and glass manufacturing
- Chemical & Pump/Valve Systems: Core components in metering pumps and plunger pumps for corrosive, high-purity, or particle-laden media
- Machinery & Automotive Industry: Balls and rollers for high-performance bearings in high-speed, high-temperature, or corrosive environments
- Electronics & Semiconductor Sector: Insulating jigs, carriers, and heater plate components in chip manufacturing
- Research & Defense: Special structures and wear-resistant parts requiring lightweight and high rigidity
- Exceptional Mechanical Strength & Hardness: Superior wear resistance and longer service life than most metals and alloys
- Outstanding Thermal Shock Resistance: Withstands rapid temperature changes without cracking
- Superior Corrosion Resistance: Resistant to most acids and alkalis for harsh environments
- Low Density & Self-Lubricating Properties: Lightweight with reduced friction coefficient
- Excellent Electrical Insulation: Maintains insulation properties even at elevated temperatures
| Parameter | Unit | Typical Value |
|---|---|---|
| Main Composition | - | Si₃N₄ ≥ 95% |
| Bulk Density | g/cm³ | 3.20 - 3.30 |
| Flexural Strength | MPa | ≥ 700 |
| Vickers Hardness | HV0.5 | ≥ 1400 |
| Fracture Toughness | MPa*m¹/² | 6.0 - 7.0 |
| Coefficient of Thermal Expansion | ×10⁻⁶/℃ (20-800℃) | 3.0 - 3.5 |
| Maximum Service Temperature | ℃ | 1200 (in air) |
| Dielectric Strength | kV/mm | ≥ 15 |
The production follows a precise multi-step process: Raw Material Preparation → Isostatic Pressing → CNC Machining (Green State) → Gas Pressure Sintering → Precision Grinding/Polishing → Non-Destructive Testing → Cleaning & Packaging. Gas Pressure Sintering is the critical step for achieving high-density, high-performance products.
- Installation: Ensure clean mating components and use specialized tools for smooth pressing
- Mating Materials: Pair with high hardness materials (cemented carbide, specialty steels) for optimal service life
- Avoid Stress Concentration: Designs should prevent sharp corners and uneven stress loads
- Cleaning: Use ultrasonic cleaners or neutral solvents; avoid highly corrosive chemicals
We provide comprehensive technical support including product consultation, custom manufacturing, and application solutions. All products undergo strict quality inspection and include a certificate of compliance.
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