High-Performance Ceramic Nozzles Silicon Nitride Material With HV10 Ge 1500 For Wear Resistance

High-Performance Ceramic Nozzles Silicon Nitride Material With HV10 Ge 1500 For Wear Resistance

Silicon nitride (Si₃N₄) nozzles are manufactured using high-purity silicon nitride powder (Si₃N₄ ≥ 99%) through gas pressure sintering (GPS) technology. These nozzles exhibit exceptional high-temperature resistance, corrosion resistance, and thermal shock resistance, making them ideal for extreme working conditions in demanding industrial applications.

Primary Applications

• Metal Processing: High-temperature molten metal atomization nozzles

• Chemical Industry: Corrosive fluid injection systems

• Energy Sector: Fuel injectors for gas turbines

• Environmental Equipment: Flue gas desulfurization spray guns

• 3D Printing: Metal powder atomization nozzles

Key Advantages

✅ Extreme Temperature Resistance: Continuous use at 1400°C (short-term 1600°C)
✅ Superior Thermal Shock Resistance: Withstands rapid temperature changes up to 1000°C
✅ Excellent Corrosion Resistance: Resistant to acids and alkalis (except hydrofluoric acid)
✅ Ultra-High Hardness: HV10 ≥ 1500, outstanding wear resistance
✅ Extended Service Life: 5-8 times longer lifespan than metal nozzles

Technical Specifications

Manufacturing Process

1. Material Preparation: High-purity Si₃N₄ powder (D50 ≤ 0.5 μm) mixed with sintering aids

2. Forming Process: Isostatic pressing (200 MPa)

3. Gas Pressure Sintering (GPS): Sintered at 1800°C in nitrogen atmosphere

4. Precision Machining: CNC grinding for high-precision dimensions

5. Quality Inspection: X-ray flaw detection, flow rate testing, and strength verification

Usage Guidelines

⚠️ Installation: Use ceramic-specific fixtures to avoid mechanical stress concentration
⚠️ Temperature Control: Heating rate ≤5°C/min (above 800°C)
⚠️ Media Restrictions: Avoid hydrofluoric acid and molten alkali metals
⚠️ Maintenance: Regularly inspect nozzle orifice for wear

After-Sales Service

• Technical Support: Free flow optimization solutions

• Customization: Non-standard hole sizes and shapes available

• Emergency Response: 24-hour technical consultation

FAQ

Q: What are the advantages of Si₃N₄ nozzles over SiC nozzles?
A: Better thermal shock resistance, superior alkali corrosion resistance, and suitability for harsher conditions.

Q: What is the maximum operating pressure?
A: Standard nozzles withstand 20 MPa, while specially designed versions can handle 50 MPa.

Q: When should a nozzle be replaced?
A: Replace if flow rate deviation exceeds ±15% or visible wear is detected.