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    AI Overview
    Nano Silicon Nitride Powder Alpha-Si3N4 | Low Price $35 ...
    Alpha-phase silicon nitride (
    αalpha
    𝛼
    -Si
    3sub 3
    3
    N
    4sub 4
    4
    ) nanoparticles are high-purity, ultra-hard, and wear-resistant structural ceramic powders. Featuring superior mechanical strength, thermal shock resistance, and high chemical stability, they are used for high-performance bearings, cutting tools, aerospace components, and in advanced composites. 
    Key Characteristics 
    • Structure: Trigonal
      αalpha
      𝛼
      -Si
      3sub 3
      3
      N
      4sub 4
      4
       phase (often appearing in equiaxed or hexagonal shapes), stable at low temperatures, known for superior hardness compared to
      βbeta
      𝛽
      -phase.
    • High Hardness & Strength: Vickers hardness around 9–9.5, with high bending and compressive strength.
    • Thermal/Chemical Stability: Excellent thermal shock resistance; does not dissolve in water but soluble in hydrofluoric acid.
    • Properties: High UV reflectivity (
      >95
      %
      ) and infrared absorption (
      >97
      %
      ), with a density often below
      3.2
      g/cm3
      .       
    Preparation and Synthesis 
    • Nitridation of Silicon Powder: Synthesis through direct nitridation often employs catalytic methods to improve
      αalpha
      𝛼
      -phase content.
    • Combustion Synthesis: Achieved via combustion of nano-
      SiO2cap S i cap O sub 2
      𝑆𝑖𝑂2
       coated silicon in nitrogen, allowing for high-purity
      αalpha
      𝛼
      -phase production.
    • Precursor-Carbothermal Reduction: Used to create high-purity, narrow-size distribution nanoparticles. 
    Common Applications 
    • Wear-Resistant Components: Bearings, roller bearing balls, sealing parts, and valve components in machinery and aerospace.
    • Advanced Composites: Reinforcing fillers in polymer composites, rubber, plastic, and ceramic-ceramic composites.
    • High-Temperature Materials: Suitable for structural components subjected to rapid heating/cooling.
    • Additive Manufacturing: Used in high-performance coatings and industrial applications. 
    Storage Conditions
    Due to high surface activity,
    αalpha
    𝛼
    -Si
    3sub 3
    3
    N
    4sub 4
    4
     nanopowders should be sealed in vacuum and stored in a cool, dry room to avoid moisture-related aggregation. 
    • Combustion synthesis of α-Si3N4 powders using in-situ nano-SiO2 ...
      Feb 15, 2021 — Abstract. Alpha phase silicon nitride (α-Si3N4) powders were synthesized by combustion reaction of the in-situ nano-SiO2 coated Si...
      ScienceDirect.com
    • Alpha Micron Size Silicon Nitride Powder Si3N4
      * Alpha micron size Silicon Nitride Powder Si3N4. * Feature of the silicon nitride powders: Silicon nitride powders possesses high...
      Hongwu International Group Ltd
    • Silicon Nitride Si3N4 Nanopowder / Nanoparticles ( ...
      Silicon Nitride Nanoparticles (Si3N4) General Features: 1. The product possesses high purity, narrow range particle size distribut...
      US Research Nanomaterials Inc.
    • Synthesis of α-Si3N4 whiskers or equiaxed particles from ...
      Oct 15, 2020 — The results demonstrated that the H2O/TEOS ratio significantly influenced the relative content of α and β phase in Si3N4 by changi...
      ScienceDirect.com
    • Liquid-Phase-Assisted Catalytic Nitridation of Silicon and In Situ Growth of α-Si3N4 - PMC
      SiN-based ceramics are used in many fields because of their mechanical properties, chemical stability, and oxidation resistance. S...
      PubMed Central (PMC) (.gov)
    • Silicon Nitride Ceramics: Structure, Synthesis, Properties, and ... - PMC
      Jul 21, 2023 — 2. Crystallographic Structure. Under ambient conditions, silicon nitride crystallizes in two polymorphs, α- and β-Si3N4. The α-Si3...
      National Institutes of Health (.gov)
    • Silicon Nitride (Si3N4) Overview & Applications | SINTX Technologies
      The material is found in applications for engine parts and engine accessory units including turbochargers for lower inertia and re...
      sintx.com
    • Preparation of high-purity α-Si3N4 nano-powder by precursor ...
      The high-purity α-Si 3 N 4 nano-powder without any β-Si 3 N 4 impurities was prepared by using a precursor-carbothermal reduction ...
      ScienceDirect.com
    • Silicon Nitride Powder / Si3N4 Powder (Si3N4, 99.6%, 800nm ...
      This product is mainly used for: 1) manufacturing structure device: such as metallurgy, chemical industry, machinery, aviation, ae...
      US Research Nanomaterials Inc.
    • Combustion synthesis of α-Si3N4 powders using in-situ nano-SiO2 ...
      Feb 15, 2021 — Abstract. Alpha phase silicon nitride (α-Si3N4) powders were synthesized by combustion reaction of the in-situ nano-SiO2 coated Si...
      ScienceDirect.com
    • Alpha Micron Size Silicon Nitride Powder Si3N4
      * Alpha micron size Silicon Nitride Powder Si3N4. * Feature of the silicon nitride powders: Silicon nitride powders possesses high...
      Hongwu International Group Ltd
    • Silicon Nitride Si3N4 Nanopowder / Nanoparticles ( ...
      Silicon Nitride Nanoparticles (Si3N4) General Features: 1. The product possesses high purity, narrow range particle size distribut...
      US Research Nanomaterials Inc.
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    Scholarly articles for Alpha Si3N4 Nanoparticles

    … -alpha reactions in nano α-Si3N4 particles by neutrons - ‎Naghiyev - Cited by 16
    … of α/β‐Si3N4 nanoparticles by carbothermal reduction … - ‎Bagci - Cited by 17

    Web results

    Nano Silicon Nitride Powder Alpha-Si3N4 | Low Price $35


    Nanochemazone
    https://www.nanochemazone.com › Other Products
    Nanochemazone
    https://www.nanochemazone.com › Other Products
    Silicon nitride ceramics have excellent properties such as high strength, high elastic modulus, wear resistance, oxidation resistance, corrosion resistance, and ...Read more
    In stock · $10 delivery

    Preparation of high-purity α-Si3N4 nano-powder by ...


    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    by B Li · 2019 · Cited by 22 — The high-purity α-Si 3 N 4 nano-powder without any β-Si 3 N 4 impurities was prepared by using a precursor-carbothermal reduction and nitridation method.Read more

    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

    Catalyst-assisted synthesis of alpha-Si3N4 in molten salt


    U.S. Environmental Protection Agency (.gov)
    https://hero.epa.gov › reference
    U.S. Environmental Protection Agency (.gov)
    https://hero.epa.gov › reference
    by J Ding · Cited by 52 — Silicon nitride (Si3N4) powder was synthesised under a nitrogen gas flow (150 mL/min) using molten salt media at relatively low temperatures (950-1350 degrees C) ...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...
    100nm,99.9% silicon nitride nano powders with high quality use as the molds, cutting tools, turbine blades, turbine rotor and the cylinder wall coatings so on.Read more

    Alpha Si3n4 Silicon Nitride Ceramic Powder Manufacturer


    SAT nano Technology Material Co., Ltd
    https://www.satnanomaterial.com › alpha-si3n4-silicon-...
    SAT nano Technology Material Co., Ltd
    https://www.satnanomaterial.com › alpha-si3n4-silicon-...
    Buy alpha si3n4 silicon nitride ceramic powder for sale, Size:50nm, 100nm, 1-3um, 5um, Purity:99.5%, high purity, low price and fast delivery, please click it ...Read more

    Facile synthesis of α‐Si3N4 nanoneedles and their ...


    农业资源与农业区划研究所
    https://iarrp.caas.cn › docs
    农业资源与农业区划研究所
    https://iarrp.caas.cn › docs
    PDF
    by X Shen · 2019 · Cited by 4 — Fabrication of large‐scale α‐Si3N4 nanotubes on Si(111) by hot‐wall chemi- cal‐vapor‐deposition with the assistance of Ga2O3. Appl Surf Sci ...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) ; Formula, Si3N4 ; Molecular Weight, 140.28g/mol ; APS, 800nm(can be customized) ; Purity, 99.6%.Read more

    Liquid-Phase-Assisted Catalytic Nitridation of Silicon and In ...


    PubMed Central (PMC) (.gov)
    https://pmc.ncbi.nlm.nih.gov › articles › PMC9457337
    PubMed Central (PMC) (.gov)
    https://pmc.ncbi.nlm.nih.gov › articles › PMC9457337
    by Z Liu · 2022 · Cited by 7 — It was well known that transition elements can regulate the kinetics of Si nitridation and accelerate the growth of α-Si3N4 [27,28]. It should be noted that, ...Read more

    Oxide Additive-Free α- → β-Si3N4 Phase Transformation at ...


    Preprints.org
    https://www.preprints.org › manuscript
    Preprints.org
    https://www.preprints.org › manuscript
    Oct 12, 2023 — The XRD analysis revealed that the α- ⇀ β-Si3N4 phase transformation proceeded mainly at 1900 ℃, and was completed by the extensive 1900 ℃-heat ...Read more
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