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Silicon Nitride - Hot-pressed ( Si3N4  )

Material Information

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General Description:  

Hot pressing of Silicon Nitride produces a material of virtually zero porosity. This hard, gray ceramic is, however, still very lightweight. Silicon Nitride shows good resistance to wear and abrasion. It shows very little oxidation at elevated temperatures and high hardness and strength above 1000C. One of its main assets is its resistance to thermal shock, due to the low thermal expansion coefficient. This material can be diamond ground to precise tolerances. It is used in gas turbine situations, as diesel engine components and as an electrical insulator.

   

Chemical Resistance

Acids - concentrated Fair
Acids - dilute Good
Alkalis Good-Poor
Halogens Good
Metals Fair

Electrical Properties

Dielectric constant 10
Volume resistivity @25C ( Ohmcm ) 1012-1015

Mechanical Properties

Compressive strength ( MPa ) 2000-3500
Hardness - Vickers ( kgf mm-2 ) 1700-2200
Shear strength ( MPa ) 480-960
Tensile modulus ( GPa ) 280-310

Physical Properties

Apparent porosity ( % ) 0
Density ( g cm-3 ) 3.11

Thermal Properties

Coefficient of thermal expansion @20-1000C ( x10-6 K-1 ) 3.3
Specific heat @25C ( J K-1 kg-1 ) 680-800
Sublimation point ( C ) 1900
Thermal conductivity @20C ( W m-1 K-1 ) 15-43
Upper continuous use temperature ( C ) 1100-1650
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Silicon Nitride - Hot-pressed on-line

We stock and supply the following standard forms:
Sputtering Target
Sputtering Target

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