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    AI Overview
    Nano Silicon Nitride Powder Alpha-Si3N4 | Low Price $35 ...
    Alpha Silicon Nitride (
    αalpha
    𝛼
    -Si
    3sub 3
    3
    N
    4sub 4
    4
    ) powder is a high-purity (often 99.9%+), white, non-oxide ceramic powder featuring high surface activity, small particle size (
    <1
    𝜇𝑚
     or nano), and high thermal/mechanical strength. It is primarily used as a raw material for producing high-performance structural ceramics in automotive, aviation, and engineering applications. 
    Key Characteristics & Applications: 
    • Properties: Offers high fracture toughness, hardness, wear resistance, corrosion resistance, and exceptional thermal shock resistance.
    • Phases:
      αalpha
      𝛼
      -Si
      3sub 3
      3
      N
      4sub 4
      4
       is preferred for creating high-density ceramics; it transitions to the
      βbeta
      𝛽
      -phase during sintering.
    • Applications: Used in high-temperature structural components, engine parts (stators, rotors), cutting tools, bearing components, and electronic applications.
    • Appearance: Typically a white, fine powder. 
    Typical Specifications (e.g., Nanochemzone, Nanorh): 
    • Purity:
      99
      %
      −99.99
      %
    • Particle Size:
      ≈800
      nm
      , or lower
    • Color: White
    • Formula:
      Si3
      N4
       
    Key Manufacturers & Suppliers: 
    • Sigma-Aldrich (85%+ alpha)
    • Nanochemzone
    • Nanorh
    • HWNANO
    • Denka Company Limited
    • Zhenxin Ferroalloy 
    Storage: Should be stored sealed in a dry place to avoid moisture and maintain purity. 
    • Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha)
      Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha). $75/100g. $295/500g $495/1kg. Stock#: US1025M. Details: Silico...
      US Research Nanomaterials Inc.
    • Nano Silicon Nitride Powder Alpha-Si3N4 | Low Price $35 | High Purity
      CAS No. ... Silicon Nitride Powder should be stored in sealed, avoid light, dry place. Room temperature storage is OK. Silicon nit...
      Nanochemazone
    • Silicon Nitride Powder - Nanorh
      Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha) ; Purity, 99.6% ; Density, 3.44 g/mL ; Color, White ; Melting P...
      Nanorh
    Show all
    • Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha)
      Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha). $75/100g. $295/500g $495/1kg. Stock#: US1025M. Details: Silico...
      US Research Nanomaterials Inc.
    • Nano Silicon Nitride Powder Alpha-Si3N4 | Low Price $35 | High Purity
      CAS No. ... Silicon Nitride Powder should be stored in sealed, avoid light, dry place. Room temperature storage is OK. Silicon nit...
      Nanochemazone
    • Silicon Nitride Powder - Nanorh
      Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha) ; Purity, 99.6% ; Density, 3.44 g/mL ; Color, White ; Melting P...
      Nanorh
    • Ceramic Materials Alpha Si3N4 Silicon Nitride Powder
      Our silicon nitride powder is in alpha phase,high purity from 99.9%-99.99%,widely used in ceramic materials.
      Hongwu International Group Ltd
    • 99.9% alpha Si3N4 Silicon Nitride Powders - SAT nano
      The silicon nitride powder has high purity, small particle size, uniform distribution, large specific surface area, high surface a...
      SAT nano Technology Material Co., Ltd
    • Silicon nitride powder, 10 max. part. size (micron), weight ...
      Silicon nitride powder, 10 max. part. size (micron), weight 1000 g, condition alpha si3n4 (85% minimum); Synonyms: SI536020 at Sig...
      Sigma-Aldrich
    • 99.9% Alpha Si3N4 Silicon Nitride Powder | Low Price $40
      99.9% Alpha Si3N4 Silicon Nitride Powders Properties /Description. 99.9% Alpha Si3N4 Silicon Nitride Powders is generally immediat...
      Nanochemazone
    • Silicon nitride powder, 99.9+ trace metals 12033-89-5 - Sigma-Aldrich
      Silicon nitride based ceramics possess high fracture toughness, hardness and wear resistance, resistance to corrosion, thermal sta...
      Sigma-Aldrich
    • Silicon Nitride Powder | Denka Company Limited
      Silicon nitride is a non-oxide ceramic having excellent thermal/mechanical characteristics. It is mainly used as a construction ma...
      デンカ株式会社
    • Silicon Nitride: What it is & Where it's Used - Saint-Gobain Refractories
      Properties of Silicon Nitride * Low density (3.17 g/cm3) * High fracture toughness (7 MPa m1/2) * Excellent flexural strength (850...
      Saint-Gobain Performance Ceramics & Refractories
    • Silicon Nitride Powder For Sale - Zhenxin Ferroalloy
      raw material for the preparation of silicon nitride ceramics, and its performance is a key factor affecting the formation and sint...
      ZHENXIN Ferroalloy Supplier
    • Why is silicon nitride (Si3N4) powder white, while the ceramic is ...
      Apr 2, 2026 — Intrinsic Optical Properties and the Physics of the White Powder. Pure silicon nitride is colorless and transparent due to its wid...
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    • Silicon Nitride Ceramics (Si₃N₄) | High Strength & Thermal Stability
      Silicon Nitride is a high-melting-point ceramic material that is extremely hard and relatively chemically inert. The material is p...
      Stanford Advanced Materials
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    99.9% Alpha Si3N4 Silicon Nitride Powder | Low Price $40


    Nanochemazone
    https://www.nanochemazone.com › Other Products
    Nanochemazone
    https://www.nanochemazone.com › Other Products
    99.9% Alpha Si3N4 Silicon Nitride Powders is generally immediately available in most volumes. Nanochemazone produces many standard grades when applicable.Read more
    In stock · $10 delivery

    Silicon nitride powder, 10 max. part. size (micron), weight ...


    Sigma-Aldrich
    https://www.sigmaaldrich.com › ... › Oxides & Ceramics
    Sigma-Aldrich
    https://www.sigmaaldrich.com › ... › Oxides & Ceramics
    Silicon nitride powder, 10 max. part. size (micron), weight 1000 g, condition alpha si3n4 (85% minimum); Synonyms: SI536020 at Sigma-Aldrich.
    $1,450.00 · In stock · $28.30 delivery

    Micro Silicon Nitride (α-Si3N4) (CAS No. 12033-89-5)


    Stanford Advanced Materials
    https://www.samaterials.com › micro-nano-materials › 22...
    Stanford Advanced Materials
    https://www.samaterials.com › micro-nano-materials › 22...
    Sep 26, 2025 — Micro Silicon Nitride (α-Si3N4) (CAS: 12033-89-5) is a dense, high-strength, and high-toughness ceramic material developed by scientists in the 1970s.Read more
    Starting from $100.00 · In stock · 4.9(166)

    Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, ...


    US Research Nanomaterials Inc.
    https://www.us-nano.com › inc › sdetail
    US Research Nanomaterials Inc.
    https://www.us-nano.com › inc › sdetail
    This product is mainly used for: 1) manufacturing structure device: such as metallurgy, chemical industry, machinery, aviation, aerospace and energy industries.Read more
    $0.59

    Silicon(IV) nitride, alpha-phase, 99.9% (metals basis)


    Fisher Scientific
    https://www.fishersci.com › ... › Metalloid Salts
    Fisher Scientific
    https://www.fishersci.com › ... › Metalloid Salts
    Silicon(IV) nitride is used in automobile industry as a material for engine parts such as diesel engines and glowplugs.Read more

    Synthesis of α-silicon nitride powder from a polymeric ...


    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    ScienceDirect.com
    https://www.sciencedirect.com › science › article › pii
    by G Yu · 1995 · Cited by 60 — The α-silicon nitride synthesised in the present work contains a wide range of particle morphologies, varying from needles (500 nm in length and 100 nm in width) ...Read more

    Silicon Nitride Powder


    Nanorh
    https://www.nanorh.com › Our Products
    Nanorh
    https://www.nanorh.com › Our Products
    Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm, Alpha) ; Purity, 99.6% ; Density, 3.44 g/mL ; Color, White ; Melting Point, 1900 °C ; Boiling Point, 2715 ...Read more

    99.9% Alpha Si3N4 Silicon Nitride Powders Manufacturer


    SAT nano Technology Material Co., Ltd
    https://www.satnanomaterial.com › 99-9-alpha-si3n4-sil...
    SAT nano Technology Material Co., Ltd
    https://www.satnanomaterial.com › 99-9-alpha-si3n4-sil...
    The silicon nitride powder has high purity, small particle size, uniform distribution, large specific surface area, high surface activity, low bulk density.Read more

    High Purity Silicon Nitride Powder | UBE Corporation


    ＵＢＥ株式会社
    https://www.ube.com › chemical › ceramics › ceramics
    ＵＢＥ株式会社
    https://www.ube.com › chemical › ceramics › ceramics
    UBE Silicon Nitride Powder is the high-quality ceramic material which is made by the original Imide-decomposition process.Read more

    Ceramic Materials Alpha Si3N4 Silicon Nitride Powder


    Hongwu International Group Ltd
    https://www.hwnanomaterial.com › ceramic-materials-al...
    Hongwu International Group Ltd
    https://www.hwnanomaterial.com › ceramic-materials-al...
    Our silicon nitride powder is in alpha phase,high purity from 99.9%-99.99%,widely used in ceramic materials.
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    People also ask
    What is silicon nitride powder?
    Silicon nitride is a non-oxide ceramic having excellent thermal/mechanical characteristics. It is mainly used as a construction material in many areas. The products in our lineup have different average particle size.

    Silicon Nitride Powder | Denka Company Limited


    Denka
    https://www.denka.co.jp › eng › product › detail_00037
    Denka
    https://www.denka.co.jp › eng › product › detail_00037
    How expensive is silicon nitride?
    Silicon Nitride Powder | Low Price $50 | Nanochemazone.

    Silicon Nitride Powder | Low Price $50 - Nanochemazone


    Nanochemazone
    https://www.nanochemazone.com › product › silicon-nitr...
    Nanochemazone
    https://www.nanochemazone.com › product › silicon-nitr...
    What is the alpha phase of silicon nitride?
    α-Si3N4 (Alpha Phase)

    - Trigonal Crystal Structure: α-Si3N4 features a trigonal crystal structure characterized by a repeating unit cell with sixfold symmetry. - Moderate Temperature Stability: This phase exhibits stability at moderately high temperatures, typically up to around 1300°C.    Jun 23, 2025

    Comparing Alpha and Beta Phase Silicon Nitride


    Advanced Ceramic Materials
    https://www.preciseceramic.com › blog › comparing-alp...
    Advanced Ceramic Materials
    https://www.preciseceramic.com › blog › comparing-alp...
    What is silicon nitride used for?
    An error has occurred. Please try again later.

    Scholarly articles for Alpha Silicon Nitride Powder

    The α/β silicon nitride phase transformation - ‎Messier - Cited by 202
    Synthesis of α-silicon nitride powder from a polymeric … - ‎Yu - Cited by 60
    … Silicon Nitride from Water‐Based alpha‐Silicon Nitride, … - ‎Hruschka - Cited by 49
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