New View larger

Silicon Nitride Powder, Si3N4, CAS 12033-89-5

HMNP-1674

New product

Silicon Nitride (Si3N4) Powder is a grey powder. Moh's hardness is 8.5. It has excellent thermal stability, thermal shock resistance, and high resistivity, and can only be corroded by dilute hydrofluoric acid and hot sulfuric acid. There are other structural compositions of silicon nitride such as Si2N, SiN, and Si2N3, which are sub-stable phases.

More details

Inquiry

Please contact us if you need customized services. We will contact you with the price and availability in 24 hours.

Data sheet

Purity97.00% - 99.999%
CAS12033-89-5
Molecular FormulaSi3N4

More info

Silicon Nitride (Si3N4) Powder is a grey powder. Moh's hardness is 8.5. HM provides high-quality Silicon Nitride (Si3N4) Powder at a competitive price, which is an important structural ceramic material. It is a super-hard substance, inherently lubricious and resistant to wear and tear, and is an atomic crystal; it resists oxidation at high temperatures. It is also resistant to hot and cold shocks, and will not shatter when heated in air to over 1000 °C, sharply cooled, and then sharply heated.   

Silicon Nitride Powder

  • Formula: Si3N4
  • Density: 3.17 g/cm³
  • Refractive index: 2.016
  • CAS: 12033-89-5
  • Water soluble: insoluble

Silicon Nitride Powder Specifications

Product

Phase Ratio

Purity (%)

Particle D50 (μm)

Element content (%)

Impurity (ppm)

N

O

C

Si free

Fe

Al

Ca

SiN

β>50%

99.999

<2.5

>38.5

<0.8

<0.15

<0.3

<5

<3

<3

SiN

β>50%

99.999

<0.8

>38.0

<2.0

<0.2

<1.2

<30

<20

<20

SiN

α>70%

99.95

<0.8

>38.5

<1.0

<0.2

<0.5

<50

<200

<50

SiN

α>92%

99.50

<2.5

>38.5

<2.5

<0.2

<0.5

<2000

<2000

<500

SiN

α>95%

99.00

<5.0

>38.0

<2.0

<0.2

<0.5

<4000

<4000

<1000

SiN

Amorphous

97.00

<50nm

>38.0

<0.2

<0.05

N/A

<600

<5

<5

Si3N4 Powder - XRD Si3N4 Powder-SEM

Silicon Nitride Powder Properties

Silicon nitride is divided into α, β, and three crystal types.

  • α is a low-temperature phase (1350-1450 ℃ generated), the temperature reaches 1500 ℃ above α will be converted into β, α, and β phase is often symbiotic, γ phase can only be obtained at very high temperatures and high pressure.

                      

Silicon Nitride Powder Production Process

Silicon nitride (Si3N4) can be produced as a powder or as a film. The main methods are direct nitridation of silicon, the reaction of SiCl4 and NH3, carbothermal reduction of SiO2, and CVD. These versatile methods yield Si3N4 with high hardness, melting point, and chemical resistance for many applications.

Silicon Nitride Powder Applications

  • Automotive engine parts 
  • High-end bearings
  • High-temperature resistant parts for immersion heaters
  • Human medical replacement parts
  • Cutting tools
  • Electronic shielding materials
  • IGBT 
  • Solar polysilicon crucibles

Silicon nitride powder has various applications due to its high-temperature resistance, high strength, and good thermal shock resistance. Adding fluxes lowers the sintering temperature of silicon nitride ceramics to 1500-1700°C using discharge plasma sintering. Although silicon nitride ceramics have excellent properties, their high cost limits market share. Reducing costs will expand their applications.

Silicon Nitride Powder Storage and Packing

Silicon Nitride (Si3N4) Powder should be kept sealed and stored in a cool and dry place. The vacuum packing is 100g/bag, 1kg/bag, 25 kg/drum, or as required.

Packing

Inquiry to Heeger Materials

Items marked with an asterisk (*) are required.
Please include item quantity, size and purity.
Privacy Information:

Heeger Materials respects your privacy, and we will NOT sell or provide your personal data to other third parties, or allow them to use your personal data for their own purposes. However, we would like to send you information from time to time by mail or email about our products and special offers in addition to the interest categories you've selected above. Read our Privacy Policy