Si3N4 is a new type of inorganic non-metallic material with high hardness, high wear resistance, high chemical stability, and high-temperature performance. Silicon nitride bearing rollers are bearing components made of a silicon nitride material, featuring low density, high precision, and long life. Compared with traditional metal bearings, silicon nitride ceramic rollers perform excellently in high-temperature environments.

In a high-temperature environment, traditional metal bearings are prone to softening, deformation, and even melting, significantly reducing bearing life. Silicon nitride ceramic roller has good high-temperature strength and stability and can be in up to 1200 ℃ high-temperature environments to maintain stable mechanical properties. This characteristic makes silicon nitride ceramic rollers in the field of high temperature have a wide range of application prospects. Silicon nitride ceramic roller has a low coefficient of thermal expansion, which means that its size and shape stability are better at high temperatures. This characteristic allows silicon nitride ceramic rollers to maintain high dimensional and rotational accuracy in high-temperature applications, thus improving the overall operational stability and reliability of the equipment.

Silicon nitride 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.

Typical properties of silicon nitride ceramics

-High strength over a wide temperature range

-High fracture toughness

-High hardness

-Excellent wear resistance

-Low thermal expansion and high thermal conductivity

-Good thermal shock resistance

-Good chemical and oxidation resistance

Application of Si3N4 Bearing rollers

-Bearing rollers

Packing

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