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Silicon nitride

Silicon nitride (Si3N4) is an important structural ceramic material. Silicon nitride has high hardness, wear resistance, oxidation resistance, and high-temperature resistance.
  • Commodity name： Silicon nitride

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  • Product Description

  • Characteristics of Silicon Nitride Products:

    Silicon Nitride (Si3N4) is an important structural ceramic material with high hardness, wear resistance, oxidation resistance, and high-temperature resistance. Silicon nitride is an atomic crystal that remains stable at high temperatures and can withstand thermal shock. Even when heated above 1000°C in air, it will not crack when rapidly cooled and then rapidly reheated.

    Silicon Nitride Product Parameters:

    Inspection Items Measured Data
    Silicon Nitride Content % >95
    α Phase Ratio % 17.5
    N % 38.58
    0% 0.62
    Fe ppm 2620
    Al ppm 1980
    Ca ppm 1100
    Particle Size: D50 (μm) 5.34

    Silicon Nitride Application Industries:

    1. Silicon nitride ceramics are widely used in the automotive industry, primarily for manufacturing engine parts and bearings. For example, in diesel engines, silicon nitride is used in glow plugs, pre-combustion chambers, and turbochargers to reduce startup time and emissions. In spark ignition engines, silicon nitride is used to reduce wear in rocker arm pads, decrease inertia and lag in turbocharger turbines, and enhance acceleration performance in exhaust control valves.

    2. Silicon nitride ceramics have important applications in the aerospace field, mainly for preparing high-temperature structural materials and thermal protection coatings. The excellent thermal stability and high-temperature performance of silicon nitride allow it to be used in extreme environments, such as withstanding severe thermal shock and thermal gradients in hydrogen/oxygen rocket engines.

    3. In mechanical manufacturing, silicon nitride ceramics are mainly used to manufacture valves, pipes, grading wheels, and ceramic tools. The most widespread application of silicon nitride is in the production of silicon nitride ceramic bearing balls, which have high speed, high-temperature resistance, self-lubrication, and corrosion resistance, and are widely used in precision machine tool spindles, electric spindle high-speed bearings, aerospace engines, and automotive engine bearings.

    4. The application of silicon nitride ceramics in electronic devices includes the preparation of heat dissipation materials for high-performance electronic devices. The good electrical insulation and thermal conductivity of silicon nitride make it perform excellently in electronic devices that require high heat dissipation performance.

    5. Silicon nitride ceramics also have potential applications in the nuclear industry, chemical industry, and environmental protection. The excellent physicochemical properties of silicon nitride show great potential in these fields.

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