What is Silicon Nitride (Si₃N₄) Micron Powder?

Silicon Nitride (Si₃N₄) micron powder is an advanced ceramic material composed of silicon and nitrogen atoms. It is known for exceptional mechanical strength, thermal stability, corrosion resistance, and high wear resistance, making it suitable for demanding industrial and technological applications.

Chemical Properties and CAS Number

• Chemical Formula: Si₃N₄
• CAS Number: 12033-89-5
• Appearance: Gray or off-white fine powder
• Density: Approximately 3.44 g/cm³
• Melting Point: Does not melt but decomposes above 1850°C
• Hardness: Very high hardness (approximately 9 on the Mohs scale)
• Chemical Stability: Highly resistant to oxidation, chemical corrosion, and thermal shock

Applications of Silicon Nitride Micron Powder

1. Ceramic Bearings

Extensively used in high-performance bearings and rollers, providing superior wear resistance, reduced friction, and longevity in harsh environments.

2. Aerospace and Automotive Components

Widely applied in turbine blades, engine components, valves, and exhaust systems, due to high thermal shock resistance, strength, and durability.

3. Electronics and Semiconductor Manufacturing

Used as an insulating material in electronic devices, semiconductor components, substrates, and dielectric films owing to excellent electrical insulation and thermal conductivity.

4. Cutting Tools and Abrasives

Employed in cutting tools, abrasive media, grinding wheels, and high-performance cutting applications due to its exceptional hardness and wear resistance.

5. Bearings and Mechanical Parts

Applied in precision ball bearings, bearings, rollers, and mechanical components, offering superior wear resistance, low friction, and long service life.

5. Aerospace and Defense

Frequently used in high-temperature applications, aerospace parts, missile components, and protective armor because of its lightweight and robust nature.

Pricing of Silicon Nitride Micron Powder

Prices vary depending on purity, particle size, application-specific requirements, and production methods:

• Industrial Grade: Typically ranges from $50 – $200 per kilogram
• High-Purity/Specialized Grade: Prices range from $200 – $1,000 per kilogram, suitable for specialized, high-performance applications

Factors Influencing Silicon Nitride Powder Prices

• Particle size and purity
• Specific application standards and certifications
• Processing complexity and method of synthesis
• Volume purchased and frequency of orders

Conclusion

Silicon Nitride (Si₃N₄) micron powder is a critical ceramic material highly valued for its mechanical, thermal, and chemical properties. It is widely adopted in various industrial, electronics, aerospace, automotive, and precision engineering sectors, demonstrating exceptional performance under demanding conditions. Pricing is influenced by purity, particle size, and intended applications.