Silicon nitride nozzles and covers have the characteristics of anti-oxidation, high high-temperature strength, and low sputter adhesion, which can extend the service life of welding parts.

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 hardness

-High corrosion resistance

-Low thermal expansion and high thermal conductivity

-Good thermal shock resistance

-Non-wetting with non-ferrous metals

-Insulation

Application of the Si3N4 Nozzle and cover

-Welding industry

-Chemical Industry

Packing

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