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Silicon Nitride Rings

Silicon nitride ring is a man-made composite product synthesized through several different chemical reaction methods. Due to the even performance in high temperature, Si3N4 is a commonly used ceramic material in the metallurgical industry. It has excellent thermal shock resistance due to the microstructure. The creep and oxidation resistance of Si3N4 is also superior, its low thermal conductivity and high wear resistance also make it an outstanding material that can withstand conditions of most industrial applications.

Silicon nitride rings produced by silicon nitride provide excellent mechanism strength and durability.

There are 5 different methods to produce silicon nitride rings including SRBSN, GPSN, HPSN, HIP-SN and RBSN, make the application and working material different slightly. In these 5 methods of production, GPSN is most commonly used to produce Si3N4 components.

Product Features:

High strength over a large temperature range
* High fracture toughness
* Good flexural strength
* Mechanical fatigue & creep resistant
* Lightweight – Low density
* High hardness and wear resistance, both impingement and frictional modes
* Superior thermal shock resistance
* Low thermal expansion
* Electrical insulator
* Good oxidation resistance
* Good chemical corrosion resistance
* Wear resistant
* High stiffness

Product Parameters:

Properties Units Value
Density g/cm3 3.31
Color dark gray
Water Absorption % @R.T. 0.0
Hardness Moh’s 9
Hardness knoop (kg/mm2) 2200
Compressive Strength MPa @ R.T. 689-2760
Tensile Strength MPa @ R.T. 360-434
Modulus of Elasticity
(Young’s Mod.)
GPa 317
Flexural Strength (MOR) MPa @ R.T. 679-896
Fracture Toughness, KIc MPa x m1/2 5.0-8.0
Max. Use Temperature
(* denotes inert atm.)
ºC 1500
Thermal Shock Resistance DT (ºC) 750
Thermal Conductivity W/m-K @ R.T. 27
Coefficient of Linear Thermal Expansion, al mm/m-ºC (~25ºC through ±1000ºC) 3.4
Specific Heat, cp cal/g-ºC @ R.T. 0.17
Dielectric Constant 1MHz @ R.T. 7.0
Dielectric Strength kV/mm 17.7
Electrical Resistivity Wcm @ R.T. 1013

Application and After-Sales Service:

Silicon nitride ring has been widely used in polysilicon reduction furnaces, military manufacturing, aviation, and power.

And it can be used in strong acids and alkalis, soluble in hydrofluoric acid but does not react with other organic acids.

Our silicon nitride rings/loops are exported to USA, Canada, Europe, and South America and Southeast Asia.

After-sales service:

Accept any repair of the product, help to improve technology for customer. And also provide long-term technical help and support for you.


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