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NR0221 Micro Silicon Nitride (β-Si3N4) Powder (CAS No. 12033-89-5)

  • Catalog No. NR0221
  • CAS Number 12033-89-5
  • APS 800μm, or customized
  • Molecular Weight 140.2833
  • Form Gray powder
  • Purity 99.9%
  • Orientation β Phase

Micro Silicon Nitride (β-Si3N4) Powder Description

Micro Silicon Nitride (β-Si3N4) (CAS: 12033-89-5) is a dense, high-strength, and high-toughness ceramic material developed by scientists in the 1970s. Silicon nitride has been used in many industrial applications such as engine components, bearings, and cutting tools. Silicon nitride has better high-temperature performance than most metals, combined with high strength stability and creep and oxidation resistance. In addition, its low coefficient of thermal expansion makes it good thermal shock resistance compared to most ceramic materials.

Micro Silicon Nitride (β-Si3N4) Powder Properties

Alpha (α-Si3N4) and beta (β-Si3N4) silicon nitride are two different crystal structures of silicon nitride.

β-Si3N4 excels in high-temperature and high-stress mechanical applications due to its superior mechanical properties.

1. Cubic Crystal Structure: β-Si3N4 has a cubic crystal structure, resulting in isotropic properties. This means its properties are the same in all directions.

2. Higher Temperature Form: It is the form of silicon nitride that is stable at higher temperatures, typically above 1,200°C.

3. Excellent Mechanical Properties: β-Si3N4 exhibits exceptional mechanical properties, including high hardness, strength, and toughness.

Micro Silicon Nitride (β-Si3N4) Powder Specifications

CAS Number


Chemical Formula


Molecular Weight



gray powder

Specific Surface Area(m2/g)


Bulk Density(g/cm3)


Tap Density(g/cm3)




Micro Silicon Nitride (β-Si3N4) Powder Applications

1. Cutting Tools: β-Si3N4 is commonly used in the manufacturing of high-performance cutting tools due to its outstanding hardness and wear resistance, particularly in metal machining and grinding applications.

2. Ceramic Bearings: It finds application in ceramic bearings, especially in high-speed and high-temperature environments, owing to its lightweight, high hardness, and chemical stability.

3. High-Temperature Furnace Components: β-Si3N4 is employed in the production of high-temperature furnace components such as tubes, crucibles, and heating elements due to its resistance to thermal shock and chemical corrosion.

4. Medical Devices: It is used in manufacturing components for medical devices such as surgical blades and implants, benefiting from its biocompatibility and corrosion resistance.

Micro Silicon Nitride (β-Si3N4) Powder Packaging

Our Micro Silicon Nitride (β-Si3N4) is carefully handled during storage and transportation to preserve the quality of our product in its original condition.

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