Silicon Nitride seal ring is a high-performance seal designed and manufactured by utilizing the characteristics of silicon nitride structural parts. With its excellent performance, silicon nitride sealing rings have broad application prospects in aerospace, automobile manufacturing, petrochemical industry, medical equipment, and other fields. With in-depth research on silicon nitride materials and the continuous optimization of production processes, silicon nitride sealing rings will gradually replace traditional seals and become a new generation of high-performance sealing products.

Silicon nitride ceramic Performance

Item

Unit

Si3N4

Type

Gas pressure sintered

Density

g/cm3

3.2-3.3

Color

Black, Grey

Young Modulus

GPa

300~320

Vickers Hardness

GPa

15 – 17

Compressive Strength

MPa

2200

Bending Strength

MPa

600-1000

Thermal Conductivity

W/m.K

20-30

Thermal Expansion

10-6/°C

3.2

Max. Working Temp.

°C

1200

Volume Resistivity

Ω ·cm

> 1014

Dielectric Constant

6

Dielectric Strength

kV/mm

12

Fracture toughness

MPa·m1/2

5.0-7.0

*Tested at room temperature

*The above information is for comparison only. The exact characteristics will vary depending on the manufacturing method.

Advantages of silicon nitride seal rings

Compared with traditional sealing rings, silicon nitride sealing rings have the following significant advantages:

-High-temperature resistance: Silicon nitride sealing rings have excellent high-temperature stability can work for a long time below 500°C, and can still maintain good mechanical properties even at 1200°C

-Corrosion resistance: Silicon nitride sealing rings have good resistance to corrosive media such as acids and alkalis, and are especially suitable for sealing needs in chemical, petroleum, and other fields

-High wear resistance: The silicon nitride sealing ring has high hardness, excellent wear resistance, and long service life, which can effectively reduce equipment maintenance costs

-Low friction coefficient: Silicon nitride sealing ring has a low friction coefficient, which can reduce equipment operating resistance and improve work efficiency

Application of Si3N4 seal rings

Silicon nitride ceramics have excellent mechanical properties, processability, and wear resistance. The silicon nitride ceramic rings are widely used in magnets, Force-driven pumps, chemical pumps, mortar pumps, mud pumps, plunger pumps, etc.

Silicon nitride rings are widely used in machinery, metallurgy, chemical industry, aviation, and semiconductor industries.

Packing

Silicon nitride seal rings use appropriate outer boxes and internal buffer materials, and some components are also vacuum-packed.