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Silicon nitride crucible

  • 成品特点

    ●High hardness●Toughness●High bending strength● High wear resistance ● Low friction coefficient ● Strong corrosion resistance ● Low thermal expansion coefficient ● High density ● Highest thermal conductivity

  • Product characteristics

    Silicon nitride has a low self diffusion coefficient, strong resistance to impurity diffusion and waterproof vapor penetration; Silicon nitride has excellent properties such as corrosion resistance, oxidation resistance, friction resistance, and self-lubrication; Silicon nitride does not react with molten silicon Si and does not adhere to Si melt, exhibiting excellent corrosion resistance and detachment. The thermal conductivity of silicon nitride crucibles is several tens of times higher than that of quartz crucibles. Using high-purity and high thermal conductivity silicon nitride crucibles instead of quartz crucibles can significantly compress the melting time and furnace cooling time when drawing monocrystalline silicon. This not only improves production efficiency, but also reduces electricity consumption, saving energy and production operating costs.

  • precision machining

    1. Self developed and self prepared silicon nitride powder

    2. Dry pressing and isostatic pressing forming

    3. Gas pressure sintering

    4. Precision machining: flat grinding, outer diameter/inner diameter grinding, precision machining, grinding, polishing and grinding

    5. Strict testing

  • application area

    ● New energy ● Medical ● Electricity ● Petroleum ● Chemical engineering ● Aerospace ● Military industry ● Electronics ● Semiconductor manufacturing components, etc.

    • Name/Characteristics alumina Zirconia silicon nitride Aluminum nitride silicon carbide boron nitride
    appearance White or milky white or ivory ivory dark gray brown black white
    density 3.9 6.05 3.2 3.3 3.15 2.3
    permittivity 10 30 11 8 9.6 3.1
    Thermal conductivity W/mk 20~37 5-8 90-130 90~230 25-40 33
    Thermal expansion coefficient(Negative sixth power of ten/K) 4.5~8
    (Negative sixth power of ten/K)    		 8~11.5
    (Negative sixth power of ten/K)    		 3.2
    (Negative sixth power of ten/K)    		 4.5
    (Negative sixth power of ten/K)    		 4.8-5.2
    (Negative sixth power of ten/K)    		 15
    (Negative sixth power of ten/K)
    Elastic modulus(Gpa) 380 210 300~320 320 400~420 *
    Poisson's ratio 0.27 0.3 0.26 0.25 0.19 *
    High temperature resistance 500°~1700° 500°~1700° 800°~1300° 1700° 1700° 2200°
    Acid and alkali corrosion resistance strong strong strong strong strong same as
    magnetism not have not have not have not have not have not have
    dimensional stability Little change with temperature Little change with temperature Little change with temperature Little change with temperature Little change with temperature Little change with temperature
    thermal shock resistance△T.℃ 200 400 800 400 600 *
    Operating centrifugal force medium more small small small small
    Customized process
    • 1

      By product

      Application requirement

    • 2

      Design and research

      Optimization scheme

    • 3

      Strict essence

      Precision drawing

    • 4

      piggyback

      Select ingredients

    • 5

      Multiple forming

      Fired blank

    • 6

      Grinding and polishing

      Precision machining

    • 7

      Multiple gage

      Professional survey

    • 8

      Qualified product

      Package and ship

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