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Customized Silicon Nitride Ceramics structural parts

Typical properties of silicon nitride ceramics
High strength over a wide temperature range
High fracture toughness
High hardness
Outstanding wear resistance
Low thermal expansion and high thermal conductivity
Good thermal shock resistance
Good resistance to chemical and oxidation
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  • 0303

Silicon nitride ceramics are advanced materials known for their exceptional properties and wide range of applications. Composed primarily of silicon and nitrogen atoms, these ceramics possess a unique combination of high strength, hardness, toughness, and resistance to wear, corrosion, and high temperatures.


Silicon nitride ceramics are typically produced through a process called sintering, where fine silicon nitride powders are compacted and heated at extremely high temperatures in the presence of sintering additives. This process results in the formation of dense, polycrystalline ceramic materials with exceptional microstructures and properties.

One of the key advantages of silicon nitride ceramics is their excellent high-temperature performance. They exhibit exceptional strength and creep resistance at temperatures exceeding 1,000 degrees Celsius, making them suitable for applications in high-temperature environments such as gas turbines, jet engines, and industrial furnaces.


Additionally, silicon nitride ceramics possess high hardness and wear resistance, comparable to that of hardened steel. This makes them ideal for use in demanding applications such as cutting tools, bearings, and seals, where resistance to abrasive wear is crucial.


Furthermore, silicon nitride ceramics are known for their excellent corrosion resistance, making them suitable for use in harsh chemical environments. They are resistant to attack by acids, alkalis, and molten metals, which expands their applicability in industries such as chemical processing, petrochemical, and metalworking.


Properties Of Silicon Nitride


Property Item Data Unit

Mechanical

Characteristics

 Color  Black/Grey -
 Density 3.2 g/cm3
Bending Strength 750 MPa
 Compressive Strength 3800 MPa
Elastic Modulus 290 GPa
Fracture Toughness 7 MPa m1/2
Weber Coefficient 15 m
Vickers Hardness 1700 HV 0.5

Thermal

Characteristics

Coefficient of Line

Thermal Expansion

2 10-6 K-1
 Thermal Conductivity 20 W/mK
Thermal Shock Resistance (Put in Water) 750 ΔT℃
Max Working Temperature 1300

 Electrical

Characteristics

Volume Resistance at 20℃ >10 Ωcm
Dielectric Strength 10×106 V/m
Dielectric Constant - εr

One MHZ Dielectric

Loss Angle at 20℃

- tanδ

Chemical

Characteristics

Nitric Acid(60%)90℃ 1 WT Loss mg/cm2/day
Sulphuric Acid(95%)95℃ ≒0.00
Caustic Soda(30%)80℃ 0.2

This data is the result of laboratory testing. Customers need to judge whether it can be used according to the specific environment.

For more customization details, Please contact us.



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