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Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications

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    Buy cheap Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications from wholesalers
    • Buy cheap Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications from wholesalers
    • Buy cheap Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications from wholesalers

    Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications

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    Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications

    Silicon Nitride Ceramic: The Ultimate Guide To Properties, Applications, And Technical Specifications

    Introduction

    Silicon Nitride (Si₃N₄) Ceramic is an advanced engineering material manufactured through powder metallurgy and high-temperature sintering processes. Its unique covalent-bonded structure endows it with exceptional mechanical, thermal, and chemical properties, including ultra-high strength, exceptional thermal shock resistance, outstanding wear resistance, and excellent corrosion resistance. Recognized as one of the most versatile high-performance ceramics, it is widely used in demanding industrial applications.

    Key Advantages

    • High Strength & Hardness: Superior wear life, significantly outperforming traditional metals.

    • High-Temperature Resistance: Maintains mechanical properties and shape stability up to 1,200°C.

    • Corrosion Resistance: Highly resistant to most acids, alkalis, and corrosive media.

    • Low Density: Only 40% the weight of steel, enabling lightweight design and reduced inertia.

    • Self-Lubricating: Low friction coefficient against metals, ideal for limited-lubrication conditions.

    Applications

    Ideal for critical components in extreme environments:

    • Mechanical Components: High-performance bearing balls, rollers, cutting tools.

    • Sealing Systems: Mechanical seal rings, pump seals for corrosive/abrasive environments.

    • Industrial Wear Parts: Sandblasting nozzles, conveyor slides, wear-resistant liners.

    • High-Temperature Components: Crucibles, thermocouple tubes, turbine blades.

    • Semiconductor Manufacturing: Wafer handling arms, vacuum chucks, precision pins.

    Technical Specifications

    PropertyUnitTypical ValueTest Standard
    Densityg/cm³3.20 - 3.30ASTM C20
    Flexural StrengthMPa600 - 850ASTM C1161
    Vickers HardnessGPa (Hv0.5)14 - 16ASTM C1327
    Fracture ToughnessMPa·m¹/²5.5 - 7.0SEPB Method
    Elastic ModulusGPa280 - 320ASTM C1198
    Max Service Temp°C (in air)1,200 - 1,300-
    CTE×10⁻⁶/°C (RT-1k°C)3.0 - 3.3ASTM E228
    Thermal ConductivityW/(m·K)25 - 35ASTM E1461

    Manufacturing Process

    Key steps: Powder Preparation → Forming (Dry Pressing/CIP/Injection Molding) → Sintering (Pressureless/Gas Pressure) → Precision Machining (Grinding/Lapping/Polishing) → Non-Destructive Testing → Final Inspection & Packaging.

    Usage Guidelines

    1. Installation: Avoid impact loading; despite high strength, it is a brittle material.

    2. Pairing: Use softer metals as counterfaces to minimize ceramic wear.

    Support & Services

    • 12-month quality warranty from shipment date.

    • Custom technical consulting and design services available.

    • Non-standard customization supported for specific applications.

    FAQ

    • Q: How does silicon nitride compare to zirconia in wear resistance?
      A: Si₃N₄ excels in high-temperature, dry, or high-speed conditions due to its superior thermal and chemical stability.

    • Q: Can complex shapes be manufactured?
      A: Yes, via Ceramic Injection Molding (CIM) for near-net-shape parts, finished with precision machining.

    • Q: What are its limitations?
      A: Primary limitations are brittleness (notch sensitivity) and higher cost compared to metals.



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