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SC1936 Silicon Nitride Electrical Insulator

Catalog No. SC1936
Color Black
Density 3.21 g/cm3
Flexural strength 800 MPa
Fracture toughness 6.5 MPam 1/2
Thermal stress parameters 569 K

 

Silicon Nitride Electrical Insulator Description

Silicon Nitride Electrical InsulatorsSilicon nitride is a man-made compound 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.

With low thermal conductivity and resistance to attack by many molten metals, Si3N4 electrical insulator is used in many RF heating applications. Comparing to other conventional insulator materials, Si3N4 electrical insulator has higher strength and thermal shock resistance, which is also an ideal insulator for aerospace applications.

There are 5 different methods to produce Silicon Nitride 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.

Silicon Nitride Electrical Insulator Specifications 

GPSN

Property

Unit

 

Color

 

Black

Mechanical Properties

   

Density

g/cm3

3.21

Compressive Strength

MPa

3000

Flexural Strength

MPa

800

Weibull-Modulus m

 

15

Fracture Toughness KIc

MPa m^1/2

6.5

Young‘s Modulus E

GPa

320

Poisson Ratio

 

0.28

Hardness Vickers (HV 1)

GPa

16

Thermal Properties

Maximum Temperature

Inert Gas

°C

1200

Air

°C

1100

Thermal Conductivity

 

25

@ 20°C

W/mK

28

@ 1000

W/mK

16

Thermal Expansion

20–100°C

10-6/K

2

20–1000°C

10-6/K

3.5

Thermal Shock parameter R1

K

600

Thermal Shock parameter R2

W/mm

15

Electrical Properties

Resistivity at 20°C

Ωcm

10^12

Resistivity at 800°C

Ωcm

10^7

Dielectric constant

1 MHz

6

 

Silicon Nitride Electrical Insulator Applications

Silicon Nitride can make products including:
* Advanced ceramic tubes
* Bearing rollers
* Ceramic cutting materials
* Cyrol bearing rollers
* Nozzles
* Seal rings
* Tube forming tools
* Mechanical engineering special applications

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