|Flexural strength||800 MPa|
|Fracture toughness||6.5 MPam 1/2|
|Thermal stress parameters||569 K|
Silicon nitride electrical insulator is a man-made composite product synthesized through several different chemical reaction methods. Due to the even performance in high temperature, Si3N4 ceramic 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, Silicon nitride 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 ceramics 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.
|Compressive Strength||3000 MPa|
|Flexural Strength||800 MPa|
|Fracture Toughness KIc||6.5 MPa m^1/2|
|Young’s Modulus E||320 GPa|
|Hardness Vickers (HV 1)||16 GPa|
|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|
|Resistivity at 20°C||10^12 Ωcm|
|Resistivity at 800°C||10^7 Ωcm|
|Dielectric constant||6 MHz|
Silicon nitride electrical insulator is ideal for applications with high dynamic stresses, thermal rigor, and demanding reliability requirements.
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It is a very good quality product. Has been working well since the day it was installed .