Silicon Nitride Solutions

Silicon Nitride Solutions

Silicon nitride has long been used in high-temperature applications. In particular, it was identified as one of the few monolithic ceramic materials capable of surviving the severe thermal shock and thermal gradients generated in hydrogen/oxygen rocket engines. Silicon nitride is often used as an insulator and chemical barrier in manufacturing integrated circuits  Some key properties of silicon nitride include: low density, superior thermal shock resistance, good oxidation resistance, mechanical fatigue resistance and high wear resistance. Typical Applications Include: reciprocating engine components, jet propulsion components, orthopedic applications, thermocouple sheaths, arc welding nozzles, chemical insulators, electrical insulators, metal cutting tools, furnace fixtures, and bearing balls.

Density, ρ g/cm3 ASTM C20 3.31  g/cm3 3.31
Water Absorption 0.0  % @ room temperature (R.T.) 0
Hardness  Mohs 9
Hardness Knoop (kg/mm2) 2200
Compressive Strength MPa @ R.T.  MPa @ R.T.  689-2760
Fracture Toughness, Kic  MPa x m1/2 5.0-8.0
Max. Use Temperature (in air)  ºC 1500
Thermal Shock Resistance  ∆T (ºC) 750
Thermal Conductivity W/m-K @ R.T. 27
Coefficient of Linear Thermal Expansion, αl  µm/m-ºC  (~25ºC through ±1000ºC) 3.4
Dielectric Constan 1 MHz @ R.T. 7
Dielectric Strength kV/mm 17.7