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PBN Crucibles for Precision Application

Pyrolytic Boron Nitride Crucible can withstand high temperatures in a high vacuum environment. It has excellent thermal conductivity, corrosion resistance, and electrical resistance.

SN1943 Silicon Nitride Welding Pin, Si3N4

Catalog No. SN1943
Color Black
Density 3.21 g/cm3
Flexural Strength 800 MPa
Fracture Toughness 6.5 MPam 1/2
Thermal Stress Parameters 569 K

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SN1943 Silicon Nitride Welding Pin, Si3N4

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Silicon Nitride Welding Pin Description

Silicon nitride welding pin is made of a high-melting-point ceramic material that is extremely hard and relatively chemically inert. Due to its even performance at high temperatures, 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.

The silicon nitride nozzles and covers have the characteristics of oxidation resistance, high-temperature strength, and less sputter adhesion, which can prolong the service life of the welding parts.

There are 5 different methods to produce silicon nitride Si3N4 ceramic, including SRBSN, GPSN, HPSN, HIP-SN, and RBSN, making the application and working material different slightly. In these 5 methods of production, GPSN is most commonly used to produce Si3N4 components.

Silicon Nitride Welding Pin 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

Silicon Nitride Welding Pin Applications

Silicon nitride welding pin is ideal for applications with high dynamic stresses, thermal rigor, and demanding reliability requirements.