SC1941 Silicon Nitride Seal Ring, Si3N4

Catalog No.	SC1941
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 Seal Ring Description

Silicon nitride seal 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.

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

There are 5 different methods to produce silicon nitride ceramic 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 Seal Ring Specifications

GPSN

Property
Color	Grey
Mechanical Properties
Density	3.21 g/cm3
Compressive Strength	3000 MPa
Flexural Strength	800 MPa
Weibull-Modulus m	15
Fracture Toughness KIc	6.5 MPa m^1/2
Young’s Modulus E	320 GPa
Poisson Ratio	0.28
Hardness Vickers (HV 1)	16 GPa
Thermal Properties
Maximum Temperature (Inert Gas)	1200°C
Maximum Temperature (Air)	1100°C
Thermal Conductivity @ 20°C	28 W/mK
Thermal Conductivity @ 1000°C	16 W/mK
Thermal Expansion (20–100°C)	2*10-6/K
Thermal Expansion (20–1000°C)	3.510-6/K
Thermal Shock parameter R1	600 K
Thermal Shock parameter R2	15 W/mm
Electrical Properties
Resistivity at 20°C	10^12 Ωcm
Resistivity at 800°C	10^7 Ωcm
Dielectric constant	6 MHz