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Aluminium Nitride ( AlN )

Material Information

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General Description:  

This material has a high electrical resistivity and thermal conductivity. It is therefore suited to the high performance electronic industry, for such applications as integrated circuit packages and heat sinks. Compared with Beryllia in such applications, it is non-toxic and has about half the thermal expansion coefficient. It is translucent to infrared and visible wavelengths (0.5 to 3 µm), and can be used as window material for infrared and radar. It has a high purity and can be used as crucible material for molten metals at high temperatures.

   

Chemical Resistance

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

Electrical Properties

Dielectric constant 9.2
Dielectric strength ( kV mm-1 ) 35
Volume resistivity @25C ( Ohmcm ) >1013

Mechanical Properties

Hardness - Vickers ( kgf mm-2 ) 1100
Shear strength ( MPa ) 450

Physical Properties

Density ( g cm-3 ) 3.33
Useful optical transmission range 500-3000nm
Water absorption - saturation ( % ) 0

Thermal Properties

Coefficient of thermal expansion @20-1000C ( x10-6 K-1 ) 4.4
Melting point ( C ) 2200
Specific heat @25C ( J K-1 kg-1 ) 800
Sublimation point ( C ) 2500
Thermal conductivity @20C ( W m-1 K-1 ) 175 - 190
Upper continuous use temperature ( C ) 1000-1800

Buy Aluminium Nitride on-line

We stock and supply the following standard forms:
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