Aluminium Nitride
Aluminium Nitride (AlN) is a material that displays relatively high thermal conductivity for an electrically insulating ceramic. For this reason it plays an important role in microelectronics applications, including heatsinks and substrates.
Aluminium Nitride also benefits from producing an oxidation layer on its surface at elevated temperatures which protects the material itself at higher temperatures. It is also resistant to attack from most molten salts including chlorides and cryolite.
Aluminium Nitride applications:
- Heatsinks in electronic devices
- Electronic substrates
- Transistor bases
- Semiconductor manufacturing
| Property | Value |
|---|---|
General |
|
| Chemical Formula | Al-N |
Mechanical |
|
| Density | 3.25 g/cm3 |
| Hardness | 1170 Knoop |
| Modulus of Elasticity | 43 - 50 x 106 psi |
| Flexural Strength | 43 - 62 kpsi |
| Compressive Strength | 300 kpsi |
| Poisson's Ratio | 0.22 |
| Fracture Toughness | 2.9 MPa m1/2 |
Electrical |
|
| Dielectric Strength | 431 V/mil |
| Dielectric Constant | 8 - 9 (@ 1 MHz) |
| Volume Resistivity | >1011 Ohm-cm |
Thermal |
|
| Coefficient of Thermal Expansion | 4.6 - 5.7 x 10-6/°C |
| Thermal Conductivity | 100 - 180 W/mK |
| Maximum Working Temperature | 1200 °C |