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NR0103 Silicon Nitride Powder, Si3N4 Powder (CAS No.12033-89-5)

Catalog No. NR0103
CAS Number 12033-89-5
Chemical Formula Si3N4
Particle Size Customized
Appearance Grayish-white powder
Purity ≥99%
Synonyms Silicon Nitride Powder, Si3N4 Powder

Silicon Nitride Powder (CAS: 12033-89-5) is a black-gray powder offered by Stanford Advanced Materials (SAM) with a commitment to high quality and competitive pricing.

Related products: Manganese Nitride (MnN) Powder, Zirconium Nitride (ZrN) Powder, Titanium Nitride Powder

The estimated delivery time of 7 to 14 days applies to standard powders. For other products, delivery times may vary.

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CAS Number
12033-89-5
Chemical Formula
Si3N4
Particle Size
Customized
Appearance
Grayish-white powder
Purity
≥99%
Synonyms
Silicon Nitride Powder, Si3N4 Powder
 
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Material
Silicon Carbide
Purity
99.9999%, or customized
Particle Size
200 mesh, or customized
Color
Black/Green
Form
Powder
Synonyms
High Purity Silicon Carbide Powder, High Purity SiC Powder
 
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Purity
99.99%/ as required
CAS Number
24304-00-5
Form
White Powder
Thermal Conductivity
~150 W/m·K
Particle Size
D50 = 1-5 µm (customizable from 0.5 µm to 20 µm)
Synonyms
Aluminum Nitride Powder, AlN Powder
 
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CAS Number
10043-11-5
Purity
≥99%, or customized
Chemical Formula
BN
Form
White Powder
Particle Size
1-3 μm, or customized
Synonyms
Boron Nitride Powder, BN Powder

FAQ

What are the key properties and advantages of silicon nitride powder?

Silicon nitride powder is renowned for its exceptional combination of properties, making it a premier advanced ceramic material. Its key advantages include: extreme hardness (for superior wear resistance), excellent thermal shock resistance (due to low thermal expansion and good thermal conductivity), high mechanical strength (retained at elevated temperatures), outstanding chemical inertness and corrosion resistance, and good electrical insulation. This unique profile makes it ideal for the most demanding applications in aerospace, automotive, electronics, and industrial tooling.

How do I choose between high alpha-phase and beta-phase silicon nitride powder?

The choice is critical and depends on your sintering process and desired final properties. High alpha-phase powders are preferred for pressureless sintering (e.g., gas pressure sintering). During sintering, the alpha phase transforms to beta, promoting densification and resulting in fine-grained, high-strength ceramics. Beta-phase powders are typically used for preparing self-reinforced ceramics or in processes where no phase transformation is desired, such as in some composite materials. Our technical team can advise on the optimal phase composition for your specific project.

Is your powder suitable for Reaction Bonded (RBSN) or Sintered (GPS/HIP) processes?

We supply powders optimized for both major processing routes. For Reaction Bonded Silicon Nitride, we offer powders with specific particle sizes and reactivity profiles to ensure complete nitridation and controlled growth. For sintered routes like Gas Pressure Sintering or Hot Isostatic Pressing, we provide high-purity, high alpha-phase powders designed to achieve full density with the appropriate sintering aids. Please specify your intended manufacturing process for a tailored recommendation.

What are the key considerations for storing and handling silicon nitride powder?

While chemically stable, silicon nitride powder requires proper handling as a fine particulate.

Storage: Keep in a dry, sealed environment to prevent moisture absorption and potential agglomeration.

Handling: Use standard industrial hygiene practices. Avoid creating dust. Use local exhaust ventilation and wear appropriate personal protective equipment (PPE) such as a dust mask (NIOSH N95 or equivalent) and safety glasses. Always refer to the specific Safety Data Sheet for detailed handling instructions.

Is the forming and sintering of silicon nitride powder complex?

Yes, achieving fully dense silicon nitride components is a technically demanding process. It is considered a "difficult-to-sinter" ceramic and typically requires: 1) Sintering Aids: Additives like Yttria or Magnesia are essential to promote liquid-phase sintering. 2) Advanced Sintering Techniques: Processes like Gas Pressure Sintering or Hot Isostatic Pressing are commonly used to achieve near-theoretical density. We provide not only the high-quality powder but also basic guidance on compatible sintering aids and can connect you with our technical experts for deeper process discussions.

Can the particle size, purity, or phase composition be customized?

Absolutely. At Stanford Advanced Materials, customization is a core strength. We can tailor silicon nitride powders to your precise R&D or production needs. This includes adjusting the particle size distribution, enhancing purity levels for specific critical impurities, and precisely controlling the alpha-to-beta phase ratio. Minimum order quantities and lead times for custom grades are project-dependent—contact our sales team to discuss your specifications.

Is silicon nitride powder toxic or hazardous?

The silicon nitride material itself is chemically inert and generally considered non-toxic. The primary hazard is physical and associated with its form as a fine powder. Inhalation of airborne dust may cause respiratory tract irritation. Therefore, it is imperative to handle it in a manner that minimizes dust generation and inhalation. Please consult the Safety Data Sheet (SDS) for comprehensive hazard identification, safe handling procedures, and first-aid measures. We provide an SDS with every shipment.

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